Nothing seems to help Little Mouse fall asleep -- not snacking, reading, snuggling, or any of the usual nursery sleep aids. So what's a mouse tot to do? Well, pick up at copy of Jackie Azua Kramer's book "If You Want to Fall Asleep" at Bank Street Bookstore, 2780 Broadway, on Saturday, June 2 at 10:30 a.m. to find out. This gentle picture book charms kids (and grownups) into a good night's sleep so well, it will easily become part of your regular nightime routine. Jackie reads and signs at this free event. No reservations or registrations required.