I didn't want to buy him more toys, as the cage will be busy and Twix will have little room to move. I introduced the new toys to him and he is very curious so far, still watching him. The cage is open with all the toys in, Twix is only interested in the toys hanging down from his new perch, completely ignoring the other new toys.
I have noticed a lot of change in his behavior since i got him the cage and the toys, so he doesn't make the baby sounds any more! I think he looks a lot happier now and he looks like he's got a million things to do