Online Registration Begins on September 22nd. - The Wheeler Avenue children , first grade through fifth grade will spend a night at the Houston Museum of Natural Science. Children will participate in a scavenger hunt, hands-on activities, a planetarium show and get the exciting opportunity to sleep in an exhibit hall! Dinner, snacks and breakfast are included. 40 spots are available and will be filled on a first come, first served basis. For frequently asked questions, click here.