I also just gave my chicks their first mealworms recently. It was hysterical to watch! Every time one of them would grab a worm they would immediately start running and peeping like crazy while the others chase after and tried to steal it.
I had a few that took longer to actually eat theirs (spent too much time running with it) and they got stolen from ALOT. Then I had a couple that caught on so quickly how to gobble them down that they ate 3 times as many as the rest and were really good and darting in to snatch them from my hands as I was trying to feed them to my other chicks.
Out of 14 chicks currently in the brooder, only one refused to even try the worms, that one being my little self-blue Belgian d'Uccle. For some reason I couldn't get her to even peck at one, though she was one of the first to try eating grapes.