TETRIX is the expansion kit of LEGO MindStorms and includes powerful motor, battery and high-strength aluminum alloy components. TETRIX and LEGO MindStorms have potential to produce laboratory equipment easily. In this study, we carry out three-point bending test to investigate the strength of aluminum alloy channel in TETRIX. In addition, we produce the movable cushion robot that can carry a person and evaluate the safety of a robot made of TETRIX components. Bending strength of the aluminum alloy channel is 44 MPa, the cushion robot can carry up to 373 kg safely. TETRIX components have adequate strength for laboratory equipment.
