Halloween is definitely going to be a bit different this year with no Trick or Treating, so I’ve created some printable Halloween science experiments to keep you busy as part of a collection of Halloween activities for kids.

Don’t forget my new book Gross Science is also available to order now! Gross Science is full of gruesome science experiments and investigations perfect for this time of year.

You might also like my Halloween STEM Challenges.

Printable Halloween science experiments Halloween activities for kids

Printable Halloween Science Experiments

Fizzy potions

Create your own spooky, fizzy potion. This is even better if you go for a walk to find a great stirring stick first! I also have a blank version of the recipe so children can write their own potion recipe for Halloween.

Potion Recipe Instructions

Optical Illusion

Optical illusions are a great activity for any time of year, but these pumpkin illusion are my favourites.

pumpkin optical illusion experiment instructions

Density Jar – FREE Halloween Science Experiment Printable

To keep this Halloween density jar simple, just use water and cheap cooking oil then try to find a spooky object to float on each layer.

Pumpkin Lava Lamp

These Halloween lava lamps would make a brilliant window decoration and can be used over and over again.

pumpkin lava lamp instructions

Blow up a (Balloon) Pumpkin

Blowing up a pumpkin balloon is a great science investigation as you can experiment with different amounts of baking/soda and vinegar, use yeast and warm water or even an effervescent vitamin tablet.

Halloween Crafts for Kids

This pumpkin suncatcher is beautiful from Crafts On Sea.

Red Ted Art has some super cute origami bats.

These Frankenstein paper plates are lovely from Simple Everyday Mom.

Can you think of any more Halloween activities for us?

Printable Halloween Science Experiments - includes lava lamps, optical illusions, potion recipes and more Halloween science #Halloweenscience #experimentprintables

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Originally posted at Science Sparks