Salerno makes a kosher pareve graham cracker that tastes just like all the
rest.  (I think it tastes normal, but it has been a long time since we've had
any with milk in them.)  It's not even a special order, our grocery store
carries them with all the rest of the graham crackers.

(They look like other graham crackers as well.  You might have the day care
buy them for all the kids or find a way to make sure the "safe" ones don't
get mixed up.)

Good luck.

Kathi