Boil cabbage in acetone, the purple pigments from the cabbage transfer to the water, therefor the water becomes purple&tge cabbage turns white, This also works for leaves boiled in alcohol....
You could try experimenting how plants react to different substances in their water, you could test which household chemicals clean rust the best, test which compounds are best for warding off moss...
I always take a bowl of water ,alluminum foil and paper clips. Build a boat like thing out of the alluminum foil, set it on the water,and see how many paper clips it will hold before it sinks.(This...
Some experiments that I have done with my children are erupting volcano you will need: baking powder fake volcano made out of play dough vinegar another experiment is the pepper trick you will need:...