Bring your little ones to the Chesterfield Aquatic Center for Tot Time. Kids ages 0-5 can splash and play in the leisure pool with their peers. Older children ages 6-11 are welcome when they are accompanied by an adult and younger children. Open to residents and non-residents. Reservations are not needed.
10 a.m. to 11:30 a.m. on Fridays through August 19. Cost is $3 for residents and $4 for non-residents. Adults are free.
More information: chesterfield.mo.us
Explore the St. Louis Zoo after dark at Boo at the Zoo. Bring your little ghouls and goblins to this non-scary celebration designed just for kids. Though this is not a trick-or-treating experience, costumes are encouraged, and each child 12 and under will receive a treat bag when they leave.
Engage your young scientist in science-related learning at the Saint Louis Science Center's Preschool Science Series. Through interactive stories and hands-on exploration, children learn about science, as well as language, problem-solving and social skills.