We put some pie pans filled with rocks out for watering the bees. This idea came thanks to a post Becky shared. It talked about bees drowning because they don't have anywhere to land and rest while imbibing. Pearce and I have experienced this, finding at least 10 dead bees in the wading pool.
Of course the munchkins had to get there pics taken with the "bee troughs".
I never thought about bees needing water, but they do. Kristi keeping bees is turning out to be a real education. The only hard thing is desensitizing the kids to the bees. They are so funny. They'll stand next to one of the hives for 5 minutes then run when you tell them they're near a hive.