12 weeks old and baby is trying to sit up

Ryan
My little guy is 12 weeks and every time I put him down on the playmat all he does is try to sit up. He will throw is arms up and lift his head and does like a little mini crunch. I have started holding his hands and let him pull up and he loves that. Anyone else's baby doing this? I feel like he is way to young to be wanting to do this already.