Kids Riddles

Born in the ocean and white as snow. When I fall back to water I disappear without a trace. What am I?

I can wave my hands at you, but I never say goodbye. You are always cool when with me, even more so when I am high! What am I?

What has one head, one foot and four legs?

What has a head, a tail, is brown, and has no legs?

What goes up and down the stairs without moving?