How are you keeping your babies busy?

My baby has lost interest in his toys, even new ones, and just wants to be with me or held by me constantly now. He will play by himself for about 10 minutes and then after that he wants me. If I'm sitting on the couch he comes and stands up next to me and whines until I pull him up on my lap. If I walk away from him he crawls after me crying. If I'm in a different room he crawls in there to find me and cries at my feet until I pick him up. It's sweet and all but I can't get anything done