Marker, pencil and tool storage was made by using Crystal Light and tin candy containers. Covered with patterned paper and then added magnets to the back of them. Her husband mounted two pieces of sheet metal purchased at a local craft store.
They sell these tins at craft stores in the wedding section (use a coupon to get a good deal) attach strong magnets. I got a metal board from Ikea and they just magnet on there. You could also paint a cookie sheet any color you like and use that.