We bought this as part of my son's first birthday and so far he's had more fun playing with it than with any of the other (more expensive!) gifts he received. The cups are simple but with plenty of scope for development and, as the other reviewers have said, there are endless games you can play with them. Regarding the size of the cups, I think they're the perfect size for little hands to grasp and play with. I'm delighted with this toy and will be buying more as gifts in the future.