Light Tables are easily made, and are wonderful for visual motor and attention skills.
DIY Light Table Materials: You can make one from wood (enough to make a square, and a piece of plexiglass screwed on to it) and plexiglass, or you can use a clear plastic container with a lid that is flat. After that, all you need is a string of Christmas lights to place inside.
Even doing everyday writing tasks on this type of table can help kids focus. Adult populations prefer to have it on a table that they can stand up to.