sundialsvc4,
What are you talking about? I am pretty sure I am qualified to know what visual means to second grade given my progeny. Standing up and looking at the person in front of them to determine if they are taller and swapping places with them is very visual and interactive.

As far as your link goes - how do you propose 20 students simultaneously do something visually with it given they have no access to a computer in the span of about 10 minutes?