SUMMER CAMP GAMES - Week #3

I've never been fond of snakes. They are alright in a case, behind glass. But I don't want to hold one or have it crawling over me.
Riddikulus!
What walks down stairs, alone or in pairs, and makes a slinkity sound?
A spring, a spring, a marvelous thing! Everyone knows it's Slinky.
It's Slinky, it's Slinky. For fun it's a wonderful toy.
It's Slinky, it's Slinky. It's fun for a girl or a boy.
It's fun for a girl or a boy!