Celebrate the spooky season with a free concert by the St. Charles Symphony. The annual event is held at the St. Peters Cultural Arts Centre. Symphony members dress up in their own costumes, play Halloween-themed music and welcome children and families to enjoy the performance.

Children who dress in costume can parade around the room and receive a special treat. The event is free and open to the public. 7 to 9 p.m.

More information: stpetersmo.net

Kids can explore the art of mask making and masquerade with craftsman Scott Schoonover as they unmask their creativity and use a variety of materials to create their own original disguise.

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