4 fantastic robots (made 1 at a time) employ 4 fantastic modes of movement, from bipedal to gear driven. Make a 6-legged Cricket, a Beast with bi-pedal motion, a Trailer, or a bobble-headed Grandpa bot. Assembling is easy and - snap! - so is transforming between modes. 3 speeds. 1 great way to combine learning and cool fun. Requires 1 AA battery. For ages 8 yrs-teen, from Elenco Electronics.