NXT/EV3 SumoBot Competition

The NXT/EV3 SumoBot Competition is one of the four STEMpalooza events.

Schools may send 1 SumoBot team to STEMpalooza.  A team consists of 4 students.  Those 4 students my be a combination of 4th and/or 5th graders.

For teams competing in more than one event, schools will be responsible for scheduling a date and time that does not conflict with any other STEMpalooza events.

Registration for SumoBot coming soon...


SumoBots can be built using either a Lego Mindstorms NXT robotics kit, or a Lego Mindstorms EV3 robotics kit.  Kits should not be combined.

A SumoBot must be built using only the pieces found in a base NXT or EV3 kit.  SumoBots cannot contain other outside materials (SumoBots may contain an optional sensor upgrade).  SumoBots must measure no more than 7" by 7" in width.  There is no height limit.


Sample robot builds for both NXT and EV3 can be found here.

Sample software for the NXT can be found here.  Sample software for the EV3 can be found here.

The playing field is a rasied circle with the dimensions as shown below.

  • Diameter: 36 Inches
  • Border line: 1.25 Inches
  • Starting line width: 0.5 Inches
  • Starting line length: 4 Inches

The top surface is flat and smooth. The surface will be gloss-white in color. 
The starting lines are two parallel red lines centered on the field. 
The outer edge of the field, the border line, is a black circular ring. 

Fields may be constructed using painted sheet materials, or purchased online as a completed field with supports.


See below for a sample video of SumoBots in action!