two students collaborate on a small catapult at the testing table
MOST STEM Challenges · 2026–27 season

Catapult
Challenge

Build a tabletop catapult from the kit, then launch a ping-pong ball for distance and accuracy. No experience needed.

Register a teamRegistration open · closes Fri, Oct 9
Register a team

Event details

When
Saturday, October 17, 20269:00 AM–12:00 PM
Where
MOST, 500 S. Franklin St., Syracuse NY 13202
Admission
Free for students and families arriving before 9:30 AM
Can’t make Saturday?
New for 2026Friday, October 16 testing sessions for school teamsChoose Friday testing when you register. We'll contact you to arrange a time.
Who
Junior, grades 4–8 · Senior, grades 9–12Teams of 1–4 students. No limit on teams per school.
Team leader
A teacher, coach, tutor, parent or guardianOr another adult with the students' guardians' permission.
Cost
Free registration, free kit per team

How the challenge works

  1. 1
    Register a team
    One adult leader registers 1 to 4 students. Register as many teams as you like.
  2. 2
    Pick up your kit
    One free kit per team at the MOST front desk. Support sessions by appointment.
  3. 3
    Build your catapult
    From the kit and the approved materials only, to the specs below.
  4. 4
    Test it on the day
    Inspection, three distance launches, three accuracy launches, and a short interview with the judges.

On the day

  • Inspection first. Judges check the specs. A repair and supply station is on site.
  • Distance. Three launches of a Velcro ping-pong ball from a 29″ table. The farthest counts.
  • Accuracy. Three launches from 50″ at a floor bullseye: a 10″ centre and two 8″ rings. Points are totalled.
  • Interview. 3 to 4 minutes with the judges on the engineering design process, Newton's laws, teamwork and creativity.

No repairs between the distance and accuracy rounds.

Rules & specs

≤ 8″ wideMeasured at the widest point.
≤ 10″ longMeasured at the longest point.
FreestandingStands on a tabletop by itself.
Kit materialsApproved materials only.
  • Hands may operate and stabilise the catapult, but it must stand on its own.
  • No counterweights, no latch, no slingshot.
  • Cutting, notching and laminating approved materials is allowed.
  • School or wood glue only. No hot glue.
A catapult that is off-spec can still be tested, but it is not eligible for awards.

Kit & approved materials

In the kit
  • 20 small and 10 large craft sticks
  • 10 rubber bands
  • 2 plastic spoons
  • 2 clothespins
  • 1 bottle of wood or school glue
  • 1 wooden dowel rod
Approved materials
  • Craft sticks, any size
  • Rubber bands
  • Plastic spoons
  • Clothespins
  • Wooden dowel rod
  • School or wood glue (no hot glue)
  • Ping-pong ball, as the projectile

Teams may add more of the approved materials. Anything not on the list is prohibited.

Kit pickup

Collect your team’s kit at the MOST front desk during open hours, or by appointment. Need a hand with the build? Support sessions are by appointment: eventcoordinator@most.org.

Awards

Junior · grades 48
  1. 1st place
  2. 2nd place
  3. 3rd place
  4. 4th place
  5. Best Team Name
Senior · grades 912
  1. 1st place
  2. 2nd place
  3. 3rd place
  4. 4th place
  5. Best Team Name
  • Team Spirit & SportsmanshipAll divisions

FAQ

How many students can be on a team?

One to four students. The team's division comes from its oldest student's grade: a team with anyone in grades 9–12 enters Senior, and a team of grades 4–8 enters Junior.

Can one school send more than one team?

Yes. There is no limit on teams per school. Each team registers separately and gets its own kit.

Who can be a team leader?

A teacher, coach, tutor, parent or guardian, or another adult with the students' guardians' permission. The leader registers the team and is our contact for it.

Does it cost anything?

No. Registration is free and every team can ask for a free kit. Admission to MOST on the day is free for students and families who arrive before 9:30 AM.

How do we get our kit?

Tick “Request a kit for this team” when you register. Kits are ready right away, while supplies last: collect yours at the MOST front desk during open hours, or by appointment.

Can we add our own materials?

Only more of the approved materials: craft sticks, rubber bands, plastic spoons, clothespins, a wooden dowel rod, and school or wood glue. Anything else, hot glue included, is not allowed.

Can adults help the students build?

Yes. Teams build together with their leader, and support sessions are available by appointment. Let the students lead, though: they explain their design to the judges on the day.

What if we can't come on Saturday?

New for 2026: school teams can test on Friday, October 16 instead. Choose Friday testing on the registration form and we'll be in touch to schedule it.

Does an adult need to come with the students?

Yes. Every student needs an adult (21 or over) with them on the day. If the team leader is coming, they cover the whole team; if not, the registration form asks for a chaperone or an adult for each student.

Do we need to bring anything on the day?

Your finished catapult and your team number, which is in your confirmation email, for check-in. The ping-pong ball is provided at testing, and a repair and supply station is on site if anything breaks on the way.

What if our catapult doesn't pass inspection?

Judges check every catapult against the specs before testing, and you can fix it at the repair and supply station. A catapult that is still off-spec can be tested, but it is not eligible for awards.

When are the awards given out?

At the end of the event on Saturday, October 17. Friday teams are welcome back for the ceremony; the registration form asks if you plan to come, and “Undecided” is fine.

Can we change our team after registering?

Yes. Email the event coordinator with your team number and what needs to change, such as a student or the team name. The address is under Contact, below.

Downloads & photos

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