Try to get him about five different insects to keep him interested. I use crickets, superworms, and wax worms that you can get just about any pet store. Make sure you're getting superworms and not giant meal worms. Giant meal worms are given hormones that make them grow faster which can be bad for your cham. The crested gecko food that sits at the bottom of my enclosure creates a good array of fruit flys, and I'm sure some bananas or other fruits (research fruits jacksons can eat) will do the trick. I'm looking for butter worms now to try to get to my fifth.