Is it normal for kids to do this?

On any other subreddit, no. Here it's perfectly normal.

At summer camp maybe?

But yea, children get moods, enter those damn craftsdwarf workshops and spam rods.

Yea kids will get moods. When their adults you can use their new legendary status with that skill.

No, usually it's an amulet.

Very.

Mine made a Bone Battle Axe