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Things to do with kids this weekend in Gaithersburg (August 14–16)

Updated August 12, 2026

The weekend of August 14–16 in Gaithersburg brings Montgomery County Fair – 4-H Day! at Montgomery County Agricultural Fair (Sunday) and LEGO® Afternoon at Gaithersburg Library (Friday). Every listing comes from the organizer's own calendar, with times, venues, and official links — free ones are marked.

Weekend snapshot

10dated family events
10likely free options

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Family events in Gaithersburg this weekend: August 14–16

Friday, August 14

3 events · 3 free

  1. LEGO® Afternoon

    Gaithersburg Library · Gaithersburg · Ages 1–12

    Gaithersburg Library Come by for some LEGO® building fun!

    Free Official ↗

  2. STEMusic Concert - Summer Reading 2026

    Gaithersburg Library - 2nd floor meeting room · Gaithersburg · Ages 5–12

    Gaithersburg Library Get ready for the ultimate STEMusic Concert!

    Free Official ↗

  3. LEGO Construction Crew and Duplos Too!

    Quince Orchard Library · Gaithersburg · Ages 1–12

    Quince Orchard Library Join us on Friday afternoons to build with LEGO and Duplos too!

    Free Official ↗

Saturday, August 15

5 events · 5 free

  1. Saturday, August 15 FREE admission for all youth ages 11 and under EVERY DAY! Fair Hours: Fairgrounds: 10:00 AM – Midnig

    Montgomery County Agricultural Fair · Gaithersburg · Ages 5–13

    Free Official ↗

  2. Master Gardeners' Plant Clinic

    Quince Orchard Library · Gaithersburg · Ages 5–13

    Quince Orchard Library Need gardening advice?

    Free Official ↗

  3. STEM Explorers: Make Your Own Dinosaur Egg

    Quince Orchard Library · Gaithersburg · Ages 1–12

    Quince Orchard Library Join us for an egg-citing adventure!

    Free Official ↗

  4. Master Gardeners Plant Clinic

    Gaithersburg Library · Gaithersburg · Ages 10–13

    Gaithersburg Library Bring your gardening questions, plant materials or mystery insects to the Montgomery County Master Gardeners!

    Free Official ↗

  5. Summer Crafts with ScribbleArtz

    Gaithersburg Library · Gaithersburg · Ages 5–12

    Gaithersburg Library Children will explore their creativity with different craft materials during this Saturday class presented by local student group ScribbleArtz!

    Free Official ↗

Sunday, August 16

2 events · 2 free

  1. Montgomery County Fair – 4-H Day!

    Montgomery County Agricultural Fair · Gaithersburg · Ages 5–13

    FREE admission for all youth ages 11 and under everyday!

    Free Official ↗

  2. 4-H Day! Sunday, Aug. 16

    Montgomery County Agricultural Fair · Gaithersburg · Ages 5–13

    FREE admission for all youth ages 11 and under EVERY DAY! Fair Hours: Fairgrounds: 10:00 AM – 11:00PM / Carnival: 12NOON – 11:00PM…

    Free Official ↗

Coming up in Gaithersburg