Puppy biting himself, putting paws in mouth, is this normal?

Hey folks I have an almost 10 week old golden doodle, and just wondering to see if this is normal. He scratches his ears, nibbles on his legs, sometimes even puts his paws in his mouth and bites them.

It’s not 24/7 or anything, and I assume it’s normal/out of boredom? But I know allergies are possible here, just wondering thoughts