Maldesto

Well i purchased a leopard gecko for my nephew who is 5, his mom and him are taking care of it. First off it is in a 10 gallon tank with a hide rock with mositure a little jar lid with calicum a water lid a hide bridge thingy :P and a 10 gallon repti carpet... It won't eat meal worms, no pets that i ever bought from this pet store will eat them... Im just wondering how i could get them to eat them. I purchased a 100 pack of meal worms for it also before i gave it to my nephew the mealworm i put in there when i first gave it to him a week ago is still in there alive and kicking.. and it eats crickits out the wazoo.. just wondering any advice on how to get it to eat something besides crickits til it gets older, as the petstore locally only sells 3/8's crickits like 2 dozen for llike 3.50 and the 1/2 inch at the other pet store are 1.25 per dozen so 2.50 a dollar cheaper for bigger crickits.. just wondering also what i should do to make it handleable it snaps at us when we try 2 hold it