[Al Skierkiewicz]

Wayne,
I lean towards letting every student participate if they want to. An item used in stage and TV and public presentations is called an "apple box". This sturdy platform comes in various sizes but is generally 12" x 24" x 6". Something similar is the wooden Pepsi cases of old but closed on top and bottom. We use them all the time to equalize height challenged people who must speak from a podium. Even Wheel of Fortune uses them on a regular basis so that height challenged contestants can spin the wheel. I understand the possibility of liability but an apple box should do the trick nicely. I bet a box made from 2 x 6 lumber is strong enough and high enough for you purposes. It would be 7" high if the bottom was left open.