Great experiments for a science party

Lots of people ask me about science parties and the best experiments to keep children entertained at a science party. Science Sparks is full of fun, safe and hands-on science activities, but here are some I think would work best at a kid’s birthday party.

Science party

Make a Lava Lamp

Lava lamps are super simple to make, and the perfect take home gift as they are completely reusable with the addition of a bit more alka seltzer. You could make a beautiful display of different coloured lava lamps and use as party favours at the end, or even give the kids a ‘make your own lava lamp kit’ in a little bag.

  lava lamp

The infamous coke and mento trick

Drop a couple of mentos into a bottle of coke and stand back! Does it work with diet drinks? Or different sweets?

Coke and Mento


Absorbing sugar cubes

This activity is simple, easy to explain and very hands on. Just add some coloured water to a plate or bowl and have some different materials on hand to see if they stop the sugar cubes absorbing the water.

sugar cube science

Make a LEGO house and test different roof materials

Sticking with the absorbing theme, you could make lots of little LEGO houses and provide sticks, leaves etc for the children to use as the roof and then spray with water to test  how watertight they are.

lego house

Science magic

Impress the kids and grown-ups with these simple science magic tricks.

Baking soda experiments

Baking Soda activities go down well with kids of all ages, any of these 10 ideas would be great fun for everyone.

Baking Soda Experiments for kids


How about making volcanoes for small groups of children, you could make them with papier mache, play dough, sand or even snow.

Baking soda Volcano

Lollystick races

Explore surface tension with these fun lollystick races.

surface tension

Vehicle races

You could race hovercrafts, LEGO balloon cars or even tugboats.

Candy Science

Try some fun candy science, the children could even build a candy house and take home as a gift.


Candy Science

Fruity Boats

How about making some fruity boats and seeing how many LEGO men it takes to make them sink?

Finally, why not end the party with a bottle rocket?

Bottle rocket

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