2 month old puppy biting issues?

I just got a two month old terrier/poodle mix. He's constantly biting during play, and nothing seems to deter him. I got him chew toys for his teeth, but he quickly forgets about it and goes for my hands, arms, legs, feet, anything he can get at. Is this something he'll grow out of or? I've tried to do the "yelp" when he bites but that just seems to make him do it more. I've tried ignoring him for a few minutes but that doesn't seem to phase him. My hands are covered in little scratches from his little teeth..ugh!!