22 Enchanting Harry Potter Science Experiments & STEM Activities

Nothing is quite as fascinating as magic. While muggles, like us, may not be able to conjure spells, we can certainly entertain and captivate our kids with magical Harry Potter Science Experiments!

These exciting Harry Potter STEM Activities for Kids will transform your students into science wizards and have them hooked. Great at sneaking cool science concepts, these Harry Potter Experiments work like magic at building young muggles’ interest in STEM fields.

Harry Potter Science Activities

Magic is a real science and we kid you not! There is a lot of science and STEM learning sneaking in these Harry Potter Activities.

So gather up your witches and wizards and dive into these magical Harry Potter Science Activities.

1. Bubbling Potion

Let’s start off with your very own potions class. This fun Harry Potter experiment will straightaway take your kids to potions making and have them brew a bubbling, fogging potion in less than 5 minutes. Now, that sounds like magic right?

Potion Ingredients:

• Dry Ice
• Hot water
• Flask
• Tongs
• Safety glasses
• Gloves

How to Make Harry Potter Bubbling Potion:

Wear your safety glasses and gloves. Add hot water into the flask and drop in pieces of dry ice into the water using tongs. This will cause dry ice to bubble and make instant thick fog oozing out of the flask! We bet this quick and easy potion would put Harry Potter potions class to shame.

Spooktacular indeed!

Related: Pair these Fun Harry Potter Activities with Harry Potter Would You Rather Questions.

2. Slip On Invisibility Cloak

All Harry Potter fans know how alluring the invisibility cloak is! One of the three prized hallows, it saved Harry a lot of trouble.

While we all would love to have Potter’s invisibility cloak for ourselves, for the moment let’s just try with making a penny disappear!

All you need for this cool Harry Potter science experiment is a glass of water and a penny. Place the penny on a table and put a clear glass over it.

To make the penny disappear, simply pour water in the glass. And like magic, the penny has become invisible! Thanks to refraction of light.

Wonder if Harry’s prized cloak worked in a similar way. What do you think?

Quick Tip: Test your science geek with 251 Science Trivia Questions for Kids.

3. Mobius Strip Hearts

Magically transform plain paper strips into interlocking hearts with this mobius strip heart activity. We assure this activity will baffle your kids and have them believing in magic.

Quick Tip: Get everyone thinking with these Science Riddles For Kids!

4. Colour Changing Wizard’s Potion

This colour changing potion is truly magical. Well, not really! A clever chemical reaction is at work here but that doesn’t make it any less mysterious and fascinating.

Sure to astound Severus Snape in his very own potions class!

Quick Tip: Also try your hands at Baking Soda & Vinegar Experiments for bubbling fun!

5. Make Marauder’s Map’s Invisible Ink

Fancy keeping a magical diary that reveals its writing only to you? Or send secret messages using invisible ink.

Our invisible ink recipe is super easy to make. Simply mix a few drops of lemon juice with water to make your invisible ink. Using a cotton swab or paintbrush, write your message with this magical ink.

As the paper dries, your message vanishes with it! To read your secret message, use the famous Revelio charm, in this case a heat source (we choose to iron the paper), to reveal your message.

You can use any heat source like a candle or hair iron to make your message visible.

Quick Tip: Add humour to your magical exploration with Funny Science Jokes & Puns.

6. Cast a Spell On Milk

Get your little wizards out for some serious Harry Potter chemistry fun! Magical milk experiment looks like straight out of Harry Potter books and is a bewitching science activity for kids.

7. Try Transfiguration

You need no magic wands to try transfiguration – the wizardry of transforming the form or appearance of an object, animal or person. We solemnly swear we kid you not!

Simple science goes a long way in Harry Potter transfiguration activities. Try your hands at making DIY slime or baking a cake to see how transfiguration works in real life.

8. Colour Changing Oobleck

When in transfiguration class, you cannot possibly miss out on Oobleck! The craziest of all, this fascinating concoction razzle-dazzle all Harry Potter fans with its weird properties.

One moment it acts like a solid and with a flip of a coin it can slip away from your hands like a liquid. And that’s not all, it changes colour just as magically!

Simply fascinating!

9. Bouncy Eggs

This classic egg in vinegar experiment is perhaps the best example of transfiguration.

It is astounding how a ready-to-break egg transforms into a bouncy egg. Make it more fun by adding highlighter pigment in the vinegar and use a black light to see the glowing bouncy egg.

10. Ice Cream In a Bag

Nothing can be more fun that transforming plain milk and sugar into a delicious frozen treat in 15 minutes! This fun transfiguration experiment of ice cream in a bag is a must try!

11. Golden Snitch Catapult

Ah the thrill of Quidditch! While we may not be able to whip a spell to get Potterheads on a flying broom chasing a golden snitch, we certainly can make a golden snitch fly with a little bit of clever engineering and creativity!

All you need is a popsicle stick catapult and a ferrero rocher chocolate. Glue yellow feathers on either side of the chocolate to make the snitch. Make a popsicle stick catapult and your budding wizards are all ready to make their snitches fly!

Turn it into a Harry Potter party game by pairing kids with one kid launching the snitch and the other catching it. The team who catches the most snitches wins the game.

What could be more fun than this!

12. Bewitched Straw

This is such a magical, fun experiment! One of the easiest harry potter experiments to do at home, this is perfect for kids of all ages.

All you need is a plastic straw, a fuzzy hand-cloth and a plastic water bottle. Rub one end of the straw nicely with the hand-cloth and balance it on the lid of the bottle. Now, bring your finger near the end you rubbed and watch it magically move towards your hand!

Spooky? Or is it static electricity playing its magic?

Related: Try Making Bridges Using Straws. It is fun engineering STEM activity for all.

13. Divination Crystal Ball

While divination might not have interested Harry (or Hermione!) enough, we bet this divination harry potter experiment for the classroom (or home!) will get everyone on their feet.

Again, a very simple science experiment – the Crystal Ball uses dry ice, hot water and soapy water to make a giant crystal ball.

14. Witch’s Brew

Potions class might not be Potter’s favourite, but our Harry Potter STEM activities for kindergarten will make sure your kids fall in love with potion making.

This foaming, erupting potion is perfect for classroom and at home – be it Halloween or Harry Potter Day!

15. Go Stargazing

You don’t need to climb Astronomy Tower at Hogwarts to uncover constellations that inspired the characters of Sirius Black, Lupin and Malfoy. Perfect for kids who love to explore space and are charmed by its mysteries.

Quick Tip: Try our STEM Space e-journal that demystifies space science for young kids.

16. Make Color Changing Flowers

Impress Pomona Sprout, the professor of Herbology at Hogwarts, with this easy harry potter science experiment for preschoolers.

17. DIY Lumos Wand

Nothing could get more hands-on than this harry potter science project for elementary students. It is fairly simple and a great way to introduce basic circuits to kids.

Related: Got a little builder at home? Try these Easy Engineering Activities for Kids!

18. Practise Legilimency

Get hands-on with legilimency spells and read your friend’s mind in a matter of few minutes with this clever Harry Potter Arithmancy trick. 

Here is how to do it:

1. Ask your friend to think of any number, keeping it secret.
2. Ask him/her to multiply the number by 100.
3. Subtract the original number from the product.
4. Finally ask him/her to add the digits of the number they got from Step 3.

Now, ask your friend if the sum is 18. We bet your friend will be stupefied! It’s like you have read your friend’s mind to know the answer.

Try it yourself!

Related: Love these math tricks? Try Math Card Games For Kids to make practising math fun!

19. Impress with Additamentum Charm

Nothing can beat this fun Harry Potter STEM Math activity! Sure to impress everyone, especially your Math teacher. 

How Additamentum works: Simply multiply the number in the center of the square with 9 and you have the answer! 

20. Harry Potter Math Magic

Work your magic around numbers with this cool magic trick. Simple math operations and you appear to be a pro at magic.

How to do it:

1. Ask your friend to pick any whole number from 1 to 10.
2. Double the number.
3. Add 4 to the product.
4. Divide the product by 2
5. Subtract the original number from the quotient.

Is the answer 2? It always is…try with another number this time. 

21. Magical Dice

This is a super-fun math trick to play on Harry Potter’s Day while you dress up as a wizard or a witch. Simply tell your friends you can see through a regular 6-faced dice and tell them the number on the bottom face with just one look.

We bluff you not! Try it yourself. Just roll the dice and subtract the number you get from 7 to know the number on the bottom face. Now, flip the dice and check it for yourself. 

22. Defy Gravity

Defy gravity and make water stick with this fun science activity for kids. We assure you, your kids will be astonished and entertained the same time with this cool trick.

23. Wingardium Leviosa

This easy Harry Potter STEM activity teaches potter fans the very basic magic spell – Wingardium Leviosa, to make things levitate. It is the perfect activity for a Harry Potter science party!

24. Colour Changing Mugs

These colour changing mugs are a big hit with older children. One of the best Harry Potter Activities for middle school, this one uses thermochromic paints to transform an ordinary mug into a magical mug fit for wizards.

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