〔電子〕Here Comes Super Grover! (Sesame Street Series)

Have a simple mechanical problem to solve? Super Grover is on the case! Watch him help find a wheel for Abby’s bike, make a ramp for Elmo’s wagon, and use a rock-and-shovel lever to lift a boulder out of his garden (sorry, Bert!). But why does his pulley get stuck when he tries to pull up Cookie Monster’s bucket? Science, Technology, Engineering, and Math (STEM) concepts are gently woven into this collection.