Signing

We've been signing with Bram for about four or five months and he has yet to sign back. I think he recognizes some of the signs but he refuses to do it himself. Same with clapping or waving. He would rather grab our hands and clap them. He uses his hands for eating, playing, or picking things up but he'd rather not use them for something that's not extremely useful (at least in his opinion, anyway). I joined a Yahoo group for parents of signing babies and I've got a bit of help there. I know he'll sign eventually, but I'm getting impatient. O_o