Not sure if your little is ready for the Caboose’s stand on platform? Don’t sweat it. The Caboose Rear Stroller Seat is a forward facing seat you can add to the rear position on the Caboose, Caboose Ultralight, and the Big Caboose. When your toddler isn’t quite ready for a stand on stroller, it’s time for a Caboose Rear Seat. When he’s outgrown it, just unsnap and store!