I put my crickets in a plastic cup, the kind you buy for beer (or soft drinks, lol) and they know what is coming when I open their cages with that cup in my hand. In fact, they come rushing to the front, hoping to catch an easy dinner. At one point I was using a small oval shaped clear glass thing that you put wasabi in, and my little girl saw it overhead and tried to get the worm I had in the cup. I could feel the pull when she hit the cup. So, in order to not damage her tongue, I now feed supers out of my hand. Each one of my chams get only 1 per day because I don't want them to think that they don't have to eat crickets any more.