# Things to do with kids in Jefferson County, MO

> 9 upcoming family events and 2 places and ongoing programs in Jefferson County, MO, in the St. Louis area. Listings whose address ZIP code is in this county (Census Bureau ZIP-to-county file). Dates and times are Central Time. Today is Sat, Oct 24.

Source: Grassy Knees is a directory of real family events, places and programs for kids across major U.S. metro areas, where every listing is researched from the organizer’s own page and shows the date we last checked it. https://grassyknees.com covers 42 metro areas as of Oct 24, 2026, with more added regularly. About: https://grassyknees.com/about
Freshness: listings are re-checked on a daily research run (latest check 2026-10-24), and new events are added as organizers post them. Sell-outs, weather cancellations and time changes show up on the live page first: https://grassyknees.com/st-louis/counties/jefferson-county-mo

## Events ahead

- [Halloween Farm Fun Days at Stuckmeyer's Farm](https://grassyknees.com/st-louis/activities/halloween-farm-fun-days-at-stuckmeyer-s-farm--listing-5821a3afddaac924d8143e64) — Sat, Oct 24 (+2 more dates) · Stuckmeyer's Farm, Fenton · Free · checked Oct 14. A fourth-generation family vegetable farm between Fenton and Arnold hosts fall weekends with u-pick and already-picked pumpkins, mums and gourds, farm animals on display…
- [Littles @ the Library: Halloween Party](https://grassyknees.com/st-louis/activities/littles-the-library-halloween-party--listing-09efd9ac5db4a82d7c8616c0) — Sat, Oct 24 · 3:00 PM – 4:00 PM · Arnold Branch, Jefferson County Library · Ages 0–5 · sold out when last checked · checked Oct 14. Halloween party for little ones ages 0-5 with a story time, photo booth, library trick-or-treating and more. Sign up required.
- [3rd Annual Cedar Hill Halloween Fest](https://grassyknees.com/st-louis/activities/3rd-annual-cedar-hill-halloween-fest--listing-5aca18fbc762a4c5fb618330) — Wed, Oct 28 · 4:00 PM – 6:30 PM · Cedar Hill Satellite, Jefferson County Library · All ages · checked Oct 14. Outdoor Halloween fun next to the Cedar Hill Satellite Library (weather permitting): costume contest for kids 0-12 at 4:30pm, pet parade and costume contest at 5:00pm, and an…
- [Number Ninjas at JCL Windsor Branch](https://grassyknees.com/st-louis/activities/number-ninjas-at-jcl-windsor-branch--listing-557058f5a7b93201958a9d68) — Wed, Oct 28 (+1 more date) · 4:30 PM – 5:00 PM · Windsor Branch, Jefferson County Library, Barnhart · checked Oct 20. Number Ninjas at Jefferson County Library's Windsor Branch in Barnhart turns math practice into an action-packed adventure. Through games, puzzles and hands-on activities, kids…
- [Halloween Indoor Mini Golf](https://grassyknees.com/st-louis/activities/halloween-indoor-mini-golf--listing-b955927573e36c4ebdcb52a4) — Sat, Oct 31 · 9:30 AM – 2:30 PM · Arnold Branch, Jefferson County Library · All ages · Paid · checked Oct 14. Jefferson County Library Foundation fundraiser with event sponsors and the Arnold Tourism Commission: 18 holes of spooky mini golf through the stacks at the Arnold Branch, with…
- [Lego-Mania Club](https://grassyknees.com/st-louis/activities/lego-mania-club--listing-cf61481b63f31f7e0b9a7fc5) — Wed, Nov 4 · 4:30 PM – 5:15 PM · Arnold Branch, Jefferson County Library · Ages 3+ · checked Oct 14. Kids tackle three LEGO building challenges. For ages 3 and older; sign-up required.
- [Fall Festival Open House at JCL Northwest Branch](https://grassyknees.com/st-louis/activities/fall-festival-open-house-at-jcl-northwest-branch--listing-1f029246a83901047a1937c1) — Sat, Nov 14 · 1:00 PM – 4:00 PM · Northwest Branch, Jefferson County Library, High Ridge · All ages · checked Oct 20. Jefferson County Library's Northwest Branch in High Ridge throws a Renaissance-themed open house on Saturday, Nov. 14, from 1 to 4 p.m. Early Music Missouri and Lost and Found…
- [Kids Time: Potato Science at JCL Arnold Branch](https://grassyknees.com/st-louis/activities/kids-time-potato-science-at-jcl-arnold-branch--listing-166bec554d4bc0df2ce5a726) — Tue, Nov 17 (+1 more date) · Arnold Branch, Jefferson County Library · Ages 5–12 · checked Oct 20. Kids ages 5 to 12 run several science experiments using ordinary potatoes at Jefferson County Library's Arnold Branch. The program is offered twice: Tuesday, Nov. 17, from 6 to 7…
- [Family Game Night (Arnold)](https://grassyknees.com/st-louis/activities/family-game-night-arnold--listing-8b7ee00b405c4e8bf75a912f) — Mon, Nov 23 · 5:00 PM – 7:00 PM · Arnold Branch, Jefferson County Library · All ages · checked Oct 14. Board games for all ages provided by the library; bring family and friends, plus snacks and non-alcoholic drinks if you like. Registration required for each person in your party.

## Places and ongoing programs

- [Toy Time at JCL Northwest Branch](https://grassyknees.com/st-louis/activities/toy-time-at-jcl-northwest-branch--listing-c097121585cff7c26b341a48) — Thursdays 10:30–11:30 a.m. (Oct 22, 29; Nov 12, 19; Dec 3, 10; Jan 7) · Northwest Branch, Jefferson County Library, High Ridge · All ages · checked Oct 20. Toy Time is an unstructured play morning at Jefferson County Library's Northwest Branch in High Ridge. Kids and their caregivers come together in the community room to play with…
- [We Rock the Spectrum Kid’s Gym – Fenton (open play)](https://grassyknees.com/st-louis/activities/we-rock-the-spectrum-kid-s-gym-fenton-open-play--listing-3d95e16237d567bff33446ce) — Open play generally Mon–Fri 9am–8pm; Saturday Toddler Time 8–10am and Open Play 6–8pm… · We Rock the Spectrum – Fenton · Paid · checked Oct 14. We Rock the Spectrum in Fenton is an inclusive sensory kids’ gym (‘the gym for all kids’) with equipment such as a zip line, swings, trampoline and ball-pit slide plus an arts &…

## Recently ended

- ["It's The Great Pumpkin" Palooza](https://grassyknees.com/st-louis/activities/it-s-the-great-pumpkin-palooza--listing-32f4b367140b91f0b73f3af2) — ended Fri, Oct 23
- [Kids Time: Spider Science](https://grassyknees.com/st-louis/activities/kids-time-spider-science--listing-8a75d62352489831d835a654) — ended Sat, Oct 17

## Nearby

- Towns in Jefferson County, MO: [Arnold, MO](https://grassyknees.com/st-louis/towns/arnold-mo) (Markdown: https://grassyknees.com/st-louis/towns/arnold-mo.md)
- [Things to do with kids in St. Louis](https://grassyknees.com/st-louis) (Markdown: https://grassyknees.com/st-louis.md)
- [This weekend in St. Louis](https://grassyknees.com/st-louis/this-weekend) (Markdown: https://grassyknees.com/st-louis/this-weekend.md)

Town pages are listed once a town has 3 current listings, county pages at 10.