my baby enjoy this mobile . there be a period -lrb- when he be 2-3 month old -rrb- when he would stop cry and kick excitedly whenever we place he in he crib and turn the mobile on . but after about 3 month of not-too-heavy use , the motor start make a whir noise , and would struggle to turn . we replace the battery several time -lrb- which do not fix the problem -rrb- , and decide to put up with the whir noise and the slowness . it finally stop turn at all after 6 month . I disassemble it , and find that it be cheap plastic construction , which rely on a thin rubber band to rotate the whole assembly . I clean the plasticky gunk from the belt-wheel -lrb- another plastic piece -rrb- , but shortly after be reassemble , the mobile slow down again . it be go in the trash .