On Amazon where you can now get the lowest price ever on this
ECR4Kids The Surf Portable Lap Desk for only $15.82 (regularly $29.99)!

This lap desk allows you to have a writing surface and a seat all in one! This desk can be used in your home, or if you’re a teacher, these would make a fun and unique addition to your classroom. Learning can happen anywhere and in any room with this desk!