What Do I Feed Baby Killdeer?

I have baby Killdeer in my yard. What do they eat? The parents are scrabbling around in the grass. Is there anything I can give them to feed the babies?
Killdeer Charadrius vociferous are ground-nesting birds that are famous for hiding their nests right out in the open with no nesting materials. They rely on “help my wing is broken” distraction displays to lead predators away from their nests.

You can feed Killdeer the mealworms we sell at Wild Birds Unlimited - East Lansing, but honestly they are fine on their own foraging for insects, spiders, snails, worms, and crayfish.