A link from a former student, accompanied by the following email:
So, I found this thing and it’s really cool and you should totes look at it. I think it’s super duper awesome, but you being the science teacher have probably seen cooler stuff….have fun :D
While I haven’t seen this, I have seen similar things. This one does as good a job as the others, if not better. I love me some scale demos.
I concur with the opinion that it is “super duper awesome”, indeed!