Doing research for my book and potential places for it to be sold I came across MoMath (The Museum of Mathematics) in New York and they have an awesome contest for teachers!
You can win $25,000 for your submission of a fun, hands-on math activity. I have one I want to submit, but since I am not teaching at a school at a moment I can't enter. If anyone wants to go in on an application with me I'd love it!
If you have a great hands-on math activity for 4th through 8th graders I think everyone should enter! Good luck!