There's a great book by Rosalind Mist called Solar System, with Things to Do tips and activites on nearly every third page; my son used that in Grade 1, after meeting an astronaut, to type a report to read to his class. He also liked the Mickey/Disney Guide to the Universe book his grandma got him; it spurred him to go online and find out more about blackholes.
If you have a Center of Science and Industry-COSI or Carnegie Science Center type of hands-on place for kids near you, look into their sleepover programs; ie: spend the night in a giant ear, or sleep in your sleeping bag in the dinosaur room. They often have "sleep under the stars, indoors" in their planetariums. Dinner, and a lecture is usually included in the program fee.
Check into a local university; many with even rudimentrary astronomy programs have decent planetariums. Kids can take class trips, or the astronomer in residence can come to their classroom, or auditorium. They often have traveling hologram/graphic presentations and virtual reality/interactive demos they can do, which are pretty darn cool (no matter what your age).
