That 2-inch square white plastic magnet with what looks like an N in a circle on it is a whiteboard magnet from a company named U Brands (the N is actually a

Luxor WB4848W 48 x 48 in. Wall Mounted Magnetic Whiteboard

U Brands Magnetic Dry Erase Board Value Pk, 16 x 20, Whiteboards

U Brands Magnetic Glass Dry Erase Board, 47 x 35 Inches, White Frosted Surface, Frameless

That 2-inch square white plastic magnet with what looks like an N

U Brands Contempo Magnetic Dry Erase Board, 8.5 x 11 Inches, White

Fab Glass and Mirror provides Magnetic glass dry-erase boards used in many settings from educational environments, conference areas or meeting rooms, hospitals, and restaurants, to residential places, where ever communication can occur. The magnetic glass will also modernize the appearance of any working area. Additionally, images, branding, and company logos can be displayed to the glass magnetic whiteboard.

Magnetic Glass Eraser Board 36 x 48 Inches Radius Corners - White

U Brands Square Magnetic Glass Dry Erase Board, Only for use with HIGH Energy Magnets, 12 x 12 Inches, Frameless, Marker Included (2343U00-01), White : Everything Else

That 2-inch square white plastic magnet with what looks like an N

U Brands Glass Dry Erase Board, 35 x 23 Inches, White Frosted Non

Lockways Magnetic Dry Erase Board| Wall Mounted Aluminum Message Presentation White Board with Pen Tray for Kids, Students & Teachers, 40 x 30

Junior Learning Rainbow Vowels Cursive

U Brands High Energy Metal Magnets for Glass Dry Erase Boards 1.25