I saw your post and had to reply!!! Games for a 4 1/2 month old??? Well apart from singing songs with actions and playing peek a boo, there's probably not a lot you can do. I used to read picture books to my daughter at that age - piont to the pictures and say the words. You can also play on the floor. I used to and still do roll around on the floor and play with my daughter and her toys. Just keep your little one stimulated with music, colours, shapes, sounds etc. It sounds like you are on the right track anyway. Have fun, that's the main thing. Bye for now, Michelle... P.S. Go outside too, share the wonders of the garden with your son, he will love it.