It's easy to buy for DD, she has a list as long as my arm
but I'm stuck for DS, and I want him to have presents to open too (with DDs help!).
He already has lots of toys from his big sister, all the obvious things like stacking cups, wooden blocks, shape sorter, rattles, books and jigsaws. What else do one year olds play with? I've forgotten what my DD was like at that age!
He also has a birthday 2 weeks after Christmas so will get more presents then, but then nothing for a whole year so maybe something that he can grow into would be a good idea?