What child hasn't dreamed of having a tree house? At Great Explorations: The Children's Museum, a grant from JMC Communities in St. Petersburg gives kids a chance to learn about architecture, engineering and construction through a tree house exhibit. Below, Ansley Burtch, 4, left, and her brother Finely Burtch, 3, peek through windows of the new tree house exhibit at the museum in St. Petersburg. The tree house also will be used in the architecture summer camp Aug. 13-17 for youngsters in grades 1-6. Cost is $150-$175, which includes a field trip. Call 821-8992 or go to www.greatexplorations.org and click on summer camps box.