I had a problem with bats roosting in the cavities of the trusses of my house before it was closed in. I stapled cardboard (from cereal boxes) over the cavities and that helped a lot.
I caught several of them. I took one of them in to my daughter's 2nd grade class. Cloth gloves (like the kind that have the rubber dots on them) are sufficient to keep them from biting you. Their teeth are very small and they don't have a powerful bite (after all, they're only after insects!). I released them far from my house.
On a positive note, their droppings are quite dry, so you can usually sweep them away without a major mess where they were.