All aboard for fun! Your budding little conductor is on track for chugga-chugga good times with the Rollplay® 4-Piece Curved Track expansion pack. Four track sections work exclusively with your Rollplay Steam Train 6V Battery Ride-On Vehicle (7221 and 7721) to add curves to your indoor railway — the more track sections you add, the larger your track becomes! These curved track pieces snap together in seconds with the 24 ft. oval or 13 ft. circle that came with your Rollplay Steam Train set. For maximum indoor thrills, combine curved tracks with Four-Packs of Straight Tracks (sold separately) to create different lengths and shapes for your train to run on. Wind around the room, down the hallway, around the table — the possibilities are endless. Get your imagination rolling!