Why are some squirrels gray? What do they eat? How do they climb trees? Preschoolers (ages 3 to 6), will learn about squirrels, through listening to stories, playing games and making a craft. Then, they'll go on an outdoor acorn hunt.

9:30 to 11 a.m. At Rockwoods Reservation. For reservations, call 636-458-2236.

More information: mdc.mo.gov

Learn about the poisonous and venomous plants and animals found in Missouri. We will be looking at and learning about snakes, spiders, bees, wasps, hornets, scorpions, mushrooms and, everybody's favorite, poison ivy. There will be live examples of venomous animals found in the area. You can come anytime during the 4 hour period. No reservations required. For all ages.

10 a..m. to 2 p.m. Free. At the August A. Busch Memorial Conservation Area.

More information: mdc.mo.gov

Enjoy an eveing of fishing at Lake 15 in this program designed for children ages 7 to 17 with special needs. Volunteers and staff will be available to lend a helping hand to beginner anglers. Fishing equipment will be provided for participating children. 

The lake has a concrete walkway and dock accessible by people with mobility issues. Participants must be accompanied by an adult. 

4:30 to 7:30 at the August A. Busch Memorial Conservation Area.

Crafternoons at Craft Alliance Center of Art + Design are an opportunity for families to spend the afternoon getting creative together.  

This is your family's chance to experience a great family adventure while you learn about everything from birds to butterflies, crickets to katydids! Participants in BioBlitz will join teams of scientists and skilled naturalists to study biodiversity in a fun, hands-on way.

Commemorate the 49th anniversary of the completion of the Gateway Arch at the Meet the Builders event. The National Park Service, along with the Jefferson National Parks Association invites the public to meet the builders of the Gateway Arch in the 1960s.