My guy now was the same as pyru's, took about a month of showing the tongs during feeding before he would eat from him. This is how I did it. I would take the back legs off the crickets and lower them to the substrate with the tongs lets say about 4 inches away from, once the tongs and cricket were on the substrate I would let the cricket go so it would run towards him and then he would grab the cricket. I would just go a little closer every night until he wasn't waiting for them to be released aymore and he was literally jumping at the tongs. This only took a couple weeks I would say and once he would take the crickets from the tongs I tried nightcrawler and once he took it that was it, he has eaten a cricket in about 5 months. And I agree also that once the diet changed his growth rate was crazy. Don't give him red wigglers, they have a very foul taste and if he gets this taste in his mouth it will turn him off from worms, I have read and heard a lot stories of this happening. Also if the worm pieces aren't big enough to move on there own you really have to bug him with it to stimulate movement. Try rubbing it under his bottom lip, this gets a reaction a lot of the time. If you go to youtube there is a couple tong feeding videos from ivory reptiles I believe that covers how to to get a picky eating pacman to take from the tongs. Sorry about repeating the red wiggler bad taste thing, while typing I forgot Pyru covered that.