Keep rolling with the VEX Robotics Steam Roller by HEXBUG! Building onto VEX Construction Collection, this construction build is loaded with features including a large rolling drum, active steering capabilities, and a control seat for your VEX mini-figure worker! Utilizing the STEM-based VEX IQ construction system, this set includes over 100 pieces for you to build and engineer your very own steam roller! Plus, extend your mathematics and engineering learning with the included STEM experiment guide and parent sheet!