If you have a border around a the base of a chalkboard or an area that is accessable to the little ones under a long window or the edge of a loooong bookcase try this for your pre-schooler… (you can even go down the hall or staircase with this!)
We have a puzzle similar to this one : Train Puzzle
(It is a favorite around here.)
I placed hook and loop tape along a bookcase and attached the sticky end to the back of the puzzle pieces. Now my children can make the train cars attach to each other without anyone stepping all over their work. And it looks great too!
works for us ;o)