Take it, Pack it, Strap it. Traykit is the all in one kids travel carry on backpack and play tray solution - a kid's backpack, which can strap to train and plane tray tables and hang from the seat in front in a car to provide an extendable play surface with raised sides. No more toys on the floor. With traykit, kids play within the backpack. There is no bulky case to stow, simply close it when you're ready to go.