On the Go is Barbie® doll's first-ever track system built to inspire new ways to play! Barbie® doll and her friends really move with motorized ponies, cars and scooters -- and they stay on track for play set storytelling. This Barbie™ On the Go small doll has two packages to get in the mail! Help her get to the post office and send her mail off for delivery with the Barbie™ On the Go Post Office track set. It has everything needed to let your imagination ride. There's a motorized scooter -- battery-power helps it drive on its own -- with a detachable trailer (to carry her packages), eight track pieces (that you can configure however you want) and accessories that feature six surprise actions triggered when Barbie® doll passes by on her scooter. Barbie® small doll has flexible hips and knees that allow her to sit on the scooter, plus a bobble head that adds realism and inspires giggles. To get started, simply push the “Barbie®” license plate on the back of the scooter; the battery-powered motor starts, and the scooter starts rolling. The 4-inch doll is held in place on the seat with a clip, and an included trailer can hook to the back. Place the packages in the trailer, and set Barbie® doll and her scooter on the track. The eight colorful track pieces can be configured in multiple ways. Just snap them together and place the accessories to create a course. Moving accessories, like an entry gate, traffic light and stop sign, swing when Barbie® small doll passes by on her scooter. There's also a framed post office with a package drop and an exit gate with pop-up checkout. Set up the play set in different ways to create your own story. The motorized action is so cool! Collect other dolls and vehicles in the line to expand the story possibilities or add other play sets to expand the world (each sold separately, subject to availability). The Barbie™ On the Go sets are designed to work together to add to the fun! Includes Barbie™ On the Go Doll, battery-powered scooter with detachable trailer, eight-piece track set and accessories. Colors and decorations may vary.