Tarhli - We got our twins a little plastic see-saw - you know one of the moulded ones that rocks. It was just from Kmart and only about $20. It is fantastic for the twins - they spend all day rocking on it If one is being a meanie and doesn't want to play, the other can sit on the middle part and rock by herself. We have used it inside and outside. It is probably our present that has had the most use.
Both of the girls also love playing with DS's trainset and cars.

Can't believe your little men are almost one already!