All projects
54 projects for age 7 · page 4 of 5
Projects
Bean in a Jar
Seeds sprout roots and shoots — you can watch a plant begin, up close.
Junk Drum Kit
Different containers make different sounds — big and hollow is deep, small and tight is sharp.
Tin-Can Telephone
Sound travels as vibrations along the tight string from one cup to the other.
Blow-Straw Painting
Moving air pushes the runny paint into branching, spidery shapes.
Homemade Fizzy Lemonade
Baking soda reacts with the lemon's acid to make bubbles — you're carbonating your own drink.
🔒 PremiumWormery in a Jar
Worms mix and tunnel through soil — you can watch them build layers and help the garden.
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.
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.
🔒 PremiumBread in a Bag
Yeast is alive — it eats sugar and burps gas that makes the dough rise.