Well, are you familiar with the "walk" tool? If not please get familiar with it.
As for your idea, do you mean in real life like a hologram or VIA the computer? (apparently 3-D printers got me too excited now)
So basicly your saying you want kids to go on the computer and look and walk around a model of whatever, first of all I think you personally can make one yourself easily with help from us.
Like I said, get familiar with the walk tool first then come back to this, go ahead and try it out.
By the way, you won't mind if I ask what grade are you teaching?