I need Christmas present ideas for our new little guy. He's currently 4 weeks old.

He's our second child (same gender as first) and so we have a lot of stuff for him already. We kept all the baby toys and clothes we had from our first child. It's a combination of stuff we had bought ourselves and hand me downs from both of our families. I have a bookcase full of toys for the 3-12 month range and more clothes than I really have room for.

My MIL can't really make it out shopping anymore due to her health and she has given us $50 for each person in our family to pick out presents for. We found stuff for our 3 year old (even though he has way too much stuff, too!) but I'm not sure about our 4 week old. We already picked out gifts from us - an interactive book about farm animals, a child tablet for learning letters, numbers, etc and then a Baby's First Christmas ornament. Any ideas?