Whiteboard game spinner

Whiteboard teaching aid for general whiteboard games and/or for math probability or random number lessons. Also, a fun way to select students to come to the board (and the last student gets a spin to select the next student as a constellation prize).

The friction pad is just a piece of foam cut to 20mm diameter with a small hole punched in the middle. You can use a yellow/green kitchen sponge.

Designed for a larger screw, but a M4 (x10) works great and is essentially self-tapping.

Cheapo suction cups: http://www.ebay.com/itm/50PCS-Clear-Transparent-Hanger-Kitchen-Bathroom-Suction-Cup-Sucker-20mm/311566424293?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649