Flipside Products Dry Erase Lap Board, 9.5" x 11", Unframed - Walmart.com
Amazon.com : Lockways Magnetic Dry Erase Board, 36 x 24 Inch Magnetic Whiteboard White Board, 1 Dry Erase Markers, 2 Magnets for School, Home, Office : Office Products
Impromptu® Full Whiteboard Screen, 42 x 72 | Safco Products