I can defiantely recommend the Fisher Price Fishbowl thingo.......Olivia loved it and we got a lot of use out of it, and now it has come into its own all over again with Charlie. (The muisic does my head in, but it is worth it to hear the accompanying giggles from my babes...)

Also agree on the books with flaps/texures/noises.

Also, something that seems to last in its entertainment is the Tupperware shape sorter red and blue ball with yellow shapes? Charlie loves it as a huge rolling rattle and Olivia still enjoys doing all the shape sorting and posting.......