T.C.
S.,
Get them a bunch of things he can play with his daughter. TinkerToys, MagnaDoodle, Monkeys in a Barrel, Chutes/Ladders, Candyland, counting bears, crayons...
Things so that he is bonding with and occupying the baby while she is bonding with and occupying him. That'll give the wife a break, and take his mind off things too.
T.