Hard riddle from a children's story.........?

A human of course!! That's an old riddle from Ancient Greek Mythology! There is a myth saying that the Sfiga(greek word for a creature) asked everyone who passed from there a riddle and if they didn't answer correctly she killed them.

A baby "walks" on both his legs and arms before learning how to walk properly.

Afterwords he walks on his legs

And when people get old use a stick to help them walk (2legs + 1foot = 3)

A person - 4 legs when they're crawling, 2 legs when theyre walking and 3 legs when they use a stick

a human being, 4 when he's a baby, 2 when he's able to walk, 3 when he's an old man (with a walking stick)

It is a human. When we are babies, we crawl on all fours. When we grow to adults, we walk on our own two feet. When we get old, we use a cane to help us walk.

A Human.

Child - 4

Normal -2

In punishment - 3

A bicycle?

a tough one but i i see that the answer is pretty hard to guess and i am with the first answer( and similar answers).

a spider after my kids get hold of it

A stool?

a cow that really pissed off a redneck.