Baby hand flapping, is it normal?

My son is almost 8 months and has been flapping his hands (like a wave) when he gets excited while playing with his toys or while eating foods that are new and exciting to him. I read that this isn’t to be concerned about until he’s older... anyone else’s baby do this as well? He has no other signs of autism so I’m just curious if this is something all babies do and then grow out of it.