The Muppets Disney Showcase Collection Muppet Movie Electric Mayhem Bus 171712 with music and motion.  Plays the "Muppet Show Theme" tune.  

Piece comes with all original packaging, though box does have damage and has been taped.  The original 3 AA batteries are still sealed in plastic shrink wrap.  There is one small scratch on the roof of the bus, as shown with toothpick for size reference.  I did test the piece with other batteries, as shown in video; the movement is not perfectly fluid, there is a small bump/pause.  Please see all photos and video.

This product is operated with a three-position switch.  The center position is "off".  To activate the music and rocking motion, move the switch to the right.  To activate only the rocking motion, move the switch to the left.

Measures approx. 7 1/2" L x 4" W x 6 1/2" H