I have a tupperware container with holes in the lid and covered by screen. Wad up some wax paper balls and place in there. For a bedding, I use wheat bran mixed with honey - just enough honey to be moist. Place your worms in there, they will cocoon and eventually turn to moths. Once the moths hatch (takes a couple of months) they will lay eggs on and around the wax paper. You have about 3 days of this mating behavior. At the end of day 3 pull out and feed off some of the moths. The rest will naturally die and are used by the worms when they hatch to feed off of.
Even for a baby, don't get in the habit of feeding a lot of waxworms. It's like feeding a baby candy - yes they like it but it's not good for them. Plus there are a lot of stories of chams going on a food strike when the waxworms are taken away. Because babies are growing so much you can't afford to have one stop eating for a few days. I'd personally wait until they were 6 months old before giving one as a treat to entice them to handfeed, or to come out onto your hand. Good luck!