Fourth grade is the sweet spot where curious kids can stop just watching science and start doing it through real teams, robots and problem-solving challenges.
At around nine or ten years old, most children have the reading fluency, focus and fine motor skills to take on structured STEM activities that earlier grades only hint at. Grade 4 also happens to be the entry point for several well-known student competitions, which makes it a natural moment to build a roadmap. This guide walks through age-appropriate grade 4 STEM activities, the beginner competitions that welcome this age group, and how to sequence them without burning your child out.
What Makes Grade 4 the Right Starting Line
The goal at this stage is exposure and confidence, not trophies. Fourth graders learn STEM best by building, testing and iterating — the same loop scientists and engineers use every day. Three habits matter more than any single contest:
- Hands-on building. Circuits from a battery, wire and bulb; a popsicle-stick bridge that must hold weight; a LEGO maze a robot has to navigate.
- Block-based coding. Tools like Scratch let kids animate characters and build simple games while absorbing sequencing, loops and conditionals — concepts designed for ages roughly 7 to 10.
- Problem-solving routines. A weekly math puzzle or science "why" question builds the persistence competitions later reward.
Beginner Competitions That Welcome 4th Graders
Several reputable programs open their doors at exactly this age. Use them as milestones, not pressure.
Robotics
FIRST LEGO League Explore serves ages 6–10 and is the gentlest on-ramp: teams build a motorized LEGO model and present what they learned about a yearly theme. When your child is ready for more, FIRST LEGO League Challenge begins at grade 4, where teams design, build and program an autonomous robot. VEX IQ also welcomes elementary students, typically placing 4th–5th graders on an elementary division team that competes in a cooperative Teamwork Challenge plus individual Robot Skills runs. Our robotics program is built around these progressions, and you can compare events on the VEX overview or FIRST LEGO League page.
Math
MOEMS (Math Olympiads for Elementary and Middle Schools) runs a Division E for grades 4–6: five short contests held monthly from November through March, each with five problems in about 30 minutes. It rewards clever thinking over speed and is a strong foundation if your child later aims for contests like the AMC sequence.
Science
Elementary Science Olympiad (Division A, grades K–6) is event-based and hands-on, covering measurement, force, energy and engineering design. There is no national tournament at this level — schools and districts run their own events — which keeps the stakes low and the curiosity high.
The best fourth-grade competition is the one that ends with your child wanting to try again next year.
A Simple Year-Long Roadmap
Here is a realistic sequence many families follow over a school year:
- Fall: Start a coding habit in Scratch and join a school or community robotics club (Explore or VEX IQ).
- Winter: Layer in MOEMS-style math practice once a week; it aligns naturally with the November–March contest window.
- Spring: Try one low-pressure event — a Science Olympiad fun day or a local robotics scrimmage — to experience teamwork under friendly competition.
- Year-round: Keep a "build of the month" at home so STEM stays playful between milestones.
Because formats, eligibility, fees and dates change each season, always confirm the current rules on each organizer's official site before you register. You can browse all of these options together on our competitions hub, and read more grade-by-grade guidance on the BIAA blog.
Where BIAA Fits
BIAA (标奥) designs coached pathways that move students from playful exploration to confident competition, matching each child's pace rather than rushing the calendar. If your fourth grader is ready to start, explore our robotics track or math program — or visit the BIAA homepage to find the right starting point for your family.