When Finn was tiny the best things we had were the play gym and an Infantino Flutterbug mobile! He loved that mobile = it attached to the side of his cot top changer. Poor thing gradually lost its wings as he pulled them off one by one!!
Nowadays he loves things like wooden blocks, a Playskool air thingy with balls that whiz around, stacking cups. He also enjoys playing with wooden spoons etc. Oh..and anything that he isn't supposed to play with!