Are you talking about phoenix worms? If so, I would not use them. A lot of frogs cannot digest them properly. If you're talking about wax worms, that isn't a healthy diet. I would get small crickets. As Eli said, they should be no bigger than the space between his eyes. As a tree frog, he'll appreciate the quick moving crickets more. Carlos has you covered on the supplements and the daily feedings. You could even try earthworm pieces and see if you have any luck there (I never have.) Good luck with your little baby and ask as many questions as you want!