When did your baby finally find their hands?

Around 2 months I would have to say. My son is a huge thumb sucker and he really started doing that where he knew what he was doing at 2 months. And now at four month his hands are his favorite toy and at nap and bed time that thumb is still in his mouth lol he is so cute when he sucks his thumb. When he gets a little older where he under stands I will start breaking him from his thumb