Bumping this to say that I've been giving my weeklings mealworms after breaking them in half.
It should be fine as long as I supply them with sand, right?
They seem to really enjoy them - it's the only way I've gotten them to come up to my hand. A couple will even jump and flap to get at them. So far, they only get them from my or a family member's hand (so they come to associate us with all that is good and right with the world rather than with just the chick-trauma of having their vent holes checked).
They're hilarious- like having our own little goofy circus. This one in particular - the most laid back/least aggressive in the group who never gets a worm unless I throw it at her - doesn't even it once she gets a hold of one. She runs around the brooder, dried up worm in her beak, cheeping frantically until everyone starts to chase her.