The Discover 'n Grow Take-Along Musical Mobile can be used in two ways. It attaches to most cribs and playpens and can be used as a musical mobile. Just turn the bumblebee dial on the underside of the mobile to wind it up. The mobile can also be used as a stroller toy. Pull the mobile off the mobile arm and use the link to attach it to a stroller canopy. Make sure to shorten the straps of the hanging toys for safety. Once attached to a stroller canopy, turn the dial and the mobile will spin. The Take-Along Musical Mobile comes with instructions on how to safely secure the mobile to a crib using the attachment strap and strings.