When: May 18-June 25, all programs are free, call 314-877-6014 to register in advance. Columbia Bottom Conservation Area, 801 Strodtman Rd, St. Louis, 314-741-2370.
The Missouri Department of Conservation offers programs for all ages like the "Retiree River Ramble," "What's in a Wetland?", "Fabulous Frogs!" and an amphibian night hike.