What are some easy science experiments for kids to do at home?

Experiment 1:

You can simply use ice and float it on water to show kid that how buoyancy force is getting the ice partly submerged in water.

Experiment 2:

Mix Baking soda with acetic acid to show kid the vigrous reaction, Carbon diaoxide as a biproduct.

Experiment 3:

Can use two magnets to make kid learn about the concept of Poles, same pole repel each other and opposite poles attract each other.