Each group needs:

• LEGO MINDSTORMS EV3 robot, such as EV3 Core Set (5003400) at https://education.lego.com/en-us/products/lego-mindstorms-education-ev3-core-set/5003400#lego-mindstorms-education-ev3
• LEGO MINDSTORMS Education EV3 Software 1.2.1, free online, you have to register a LEGO account first; at https://www.lego.com/en-us/mindstorms/downloads/download-software
• computer, loaded with EV3 1.2.1 software
• HiTechnic Software Downloads at https://www.hitechnic.com/downloadnew.php?category=38
• mouse trap with trigger pin removed

Note: This activity can also be conducted with the older (and no longer sold) LEGO MINDSTORMS NXT set instead of EV3; see below for those supplies:

• LEGO MINDSTORMS NXT robot, such as the NXT Base Set
• computer, loaded with NXT 2.1 software
• 1 HiTechnic NXT Acceleration/Tilt sensor
• laptop or desktop computer with imported HiTechnic Acceleration Sensor Block for MINDSTORMS NXT Software Versions 2.0

To share with the entire class:

• different diameter LEGO wheels and miscellaneous LEGO pieces (provided in the LEGO MINDSTORMS EV3 Education Core Set)
• string (nylon, kelvar or equivalent)
• roll of 1-2 inch packaging tape
• meter stick
• kitchen scale