Makeblock mbot arduino compatible stem robot kits with bluetooth or 24ghz makeblock 98052 the mbot servo add on pack from makeblock lets you add extra movement to your latest mbot creation for example you could mount the mbots ultrasonic range finder onto the servo allowing your bot to scan its environment supplied with 1 x 9g servo and adaptor 1 x rgb led 2 x brackets 2 x plates 4 x cuttable linkages 4 x brass risers m4 x 25 plus a spanner cables screws and nutsthis kit req