Kitchen Science projects
24 projects for age 7 · page 2 of 2
Projects
Tin-Can Telephone
Sound travels as vibrations along the tight string from one cup to the other.
Homemade Fizzy Lemonade
Baking soda reacts with the lemon's acid to make bubbles — you're carbonating your own drink.
Ice Excavation Rescue
Warm water, salt and gentle tools all speed up melting — salt lowers the temperature ice melts at.
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!).
Dancing Raisins
Fizzy bubbles cling to the rough raisins and lift them up; at the top the bubbles pop and they sink - over and over.
🔒 PremiumBread in a Bag
Yeast is alive — it eats sugar and burps gas that makes the dough rise.
Invisible Lemon Ink
Lemon juice browns faster than plain paper when warmed, revealing the writing - a gentle heat reaction.
Ice Cream in a Bag
Salt makes ice melt at a colder temperature, pulling heat from the cream so it freezes.
Bottle-Top Volcano
A chemical reaction: an acid (vinegar) and a base (baking soda) make carbon dioxide gas, which is the fizzy foam.
🔒 PremiumNaked (Rubber) Egg
Vinegar (an acid) dissolves the hard shell, leaving the bendy membrane - and the egg swells as water moves in (osmosis).
🔒 PremiumRed Cabbage Colour Changer
Red cabbage juice is a natural indicator - it turns pink in acids and blue/green in alkalis.
🔒 PremiumBalloon Hovercraft
A cushion of escaping air reduces friction, so the disc glides almost freely.