I just bought my middle son the leopard gecko he has been asking to have for his birthday. We also brought home 25 live crickets that I hope will last the week to feed the gecko. What is the best way to keep them alive & well all week? There was a pricey cricket-keeper sold at the pet store, but it looked much like a regular plastic critter keeper with the addition of a few tubes. I didn't think it justified the $20 price tag. I have the crickets in a plain plastic critter keeper. What else do they need to keep them alive & well until they're fed to the gecko?