Kids of all ages will learn about common trees at this free Discovery Day at the Watershed Nature Center. Then they'll make leaf sun catchers with colorful leaves, tree bark rubbings, examine leaf anatomy and tree rings, sort leaves and seeds and more.

Kids of all ages will learn about owls, bats and spiders at this free Discovery Day at Watershed Nature Center. Visitors will disect owl pellets, learn about owl body part, build a spider and play a spider web game.

10 a.m. to noon. Free, but tickets are required.

For more information and tickets: watershednaturecenter.org

Your kids will have a blast while you have the day or evening to yourself. Parents' Day Out at Learn Through Play means you can drop off your child, age 2 through 12, anytime between the hours of 8 a.m. and 10:30 p.m. at a reduced hourly rate. 

Weather permitting, St. Louisans will get a relatively rare glimpse of a total lunar eclipse. Join the Saint Louis Science Center staff and members of the St. Louis Astronomical Society as they guide you through this exciting viewing event.

6 to 11 p.m. at the James S. McDonnell Planetarium - Archery Field

More information: slsc.org

Middle schoolers (ages 12 to 15) can enjoy a mind-bending night of trivia fun! Trivia Funhouse will host seven rounds of trivia for middle schoolers and their friends to compete for prizes. Teams can enter the patriotic-themed "best dressed" competition by decorating themselves and their table in the most red, white and blue gear. The team with the best dressed table will win extra mulligans to increase their chance of victory. 

At the Lodge of Des Peres. Doors open at 6:15 and trivia starts at 7 p.m. Cost is $120 for a table of 8. Advanced registration is required.

Bring your whole family to learn, explore and play on the farm at Family Hike and Play Day at Willoughby Farm. Explore the nature trails and then enjoy games around the farm yard. 

Cost is $2 per person with a maximum of $10 per family.

Helping children stress less is difficult in today's high pressure world. Dr. Dan Weinstein will review the prevalence, triggers, and causal factors of the ever-increasing issue of clinical anxiety in children and adolescents. Co-occurence of anxiety with other disorders, including ADHD and depression, will also be discussed.

Participants will leave with practical recommendations about effective treatments for anxious students both at home and in the classroom.

6:30 p.m. at Miriam School in Webster Groves. Free, but registration is required.