The FP Ocean Wonders Aquarium! We got it for Kynan when he was about 2.5 months old and he still loves it at 9.5 months. He figured out how to turn it on and off by himself really quickly and he loves spinning the toys around.

He also loves the rattle that a friend gave him when he was born (one of those 2 coloured ones with the rings IYKWIM?), and any toys that make a crinkly sound or vibrate and move acros the floor. Oh and we got him the FP play wall thing for Christmas and that keeps him occupied for quite a while.