All projects
19 projects · page 1 of 2
🔒 PremiumBalloon Hovercraft
A cushion of escaping air reduces friction, so the disc glides almost freely.
Bean in a Jar
Seeds sprout roots and shoots — you can watch a plant begin, up close.
Bottle-Top Volcano
A chemical reaction: an acid (vinegar) and a base (baking soda) make carbon dioxide gas, which is the fizzy foam.
🔒 PremiumBread in a Bag
Yeast is alive — it eats sugar and burps gas that makes the dough rise.
Fizzy Sherbet Sweets
Citric acid and baking soda are dry until they hit the wet on your tongue — then they fizz (that same gas reaction!).
Homemade Fizzy Lemonade
Baking soda reacts with the lemon's acid to make bubbles — you're carbonating your own drink.
Ice Cream in a Bag
Salt makes ice melt at a colder temperature, pulling heat from the cream so it freezes.
Ice Excavation Rescue
Warm water, salt and gentle tools all speed up melting — salt lowers the temperature ice melts at.
Invisible Lemon Ink
Lemon juice browns faster than plain paper when warmed, revealing the writing - a gentle heat reaction.
Magic Cornflour Gloop
Gloop is a wonderfully strange mixture that feels solid when you press it fast but runs like liquid when you hold it gently, giving children a first, hands-on taste of how materials can behave in surprising ways.
Moon-Crater Impact Tray
Dropping balls into a tray of flour shows how meteorites smashing into the Moon made its craters, and lets you test how the size and drop height of a space rock changes the crater it leaves.
🔒 PremiumNaked (Rubber) Egg
Vinegar (an acid) dissolves the hard shell, leaving the bendy membrane - and the egg swells as water moves in (osmosis).