we have lots of singing time together, I put Thomas on my knee facing me and we sing loads of songs and do actions, I sing anything from incy wincy spider to hey jude!!!
Thomas also hated his yummy but like Tuck we practised a little each day and now he really enjoys it, he also loves his swing so spends a while in that some days. His activity gym was his favourite though, we had a rainforst one and I always used to put him on that and he would watch the lights, dance to the songs and play with his toys that dangle down.
Now he is a bit older and is rolling everywhere I have bought him a play mat which doesn't have the restictive arch that the gym has, I put him in the middle of that with his soft bricks and loads of other tohys and he spends ages playing with all his things!