Here are some kid-friendly free materials on native bees and other pollinators.
5 Things Kids Can Do to Help Pollinators (a one-page b&w handout)
You might ant to consider building nests for native bees from plant stems or blocks of wood (2 pp. color)
Extension Bulletin E2985 Conserving Native Bees on Farmland (4 pp. color, with great photos of Michigan's native bees)
"Nature's Partners: Pollinators, Plants, and You" a curriculum for grades 3-6