I put mealworms in a little ceramic bowls and place them in there enclosures. It took my tokays 2-3 weeks before they got use to eating them out of a bowl. I would put fresh gutloaded mealworms in there bowl every other day. I almost gave up trying to get them to eat out of a bowl but being persistant paid off and now they do it.
Also, there are better and healthier alternatives to mealworms. Mealworms are high in chitin and have a low meat to shell ratio.