It's quite difficult to hand feed a fruit fly.......but with a cricket if you hold one of its legs and let the Chameleon see it that should do it. Sometimes you'll have to be patient and stay very still for a while. It really doesn't usually take much to get a chameleon interested in mealworms, just drop a couple into a bowl and he'll work out the rest. Remember that mealworms are low in nutrients and high fat so should only be a very occasional treat