I actually made this over the summer, but am just now putting the idea up. One of my professors showed us this idea and I had to make one. It is a life size hundreds chart that the students can walk on. I used it to review the hundreds chart at the beginning of the year. I used it when we talked about skip counting and when we did graphing to make human graphs! Love this thing!
All you need is clear picnic table covering, clear packing tape (to piece the plastic together to make it a perfect square), and blue painters tape : ) So easy and the students LOVE using it!