Mindboards

Sorry if this has already been posted but I think it is something special!


http://www.youtube.com/watch?v=IJSfaSmm ... r_embedded#!

i can only imagine how much time and effort went into that thing...

And here is another one.

I especially like this one because it seems to have very few moving parts but is very effective.

http://www.youtube.com/watch?v=Ji7rF7Kd ... re=related

The link in the original post goes to a video which has been removed.

I'm curious as to what it was...

I think it was a great ball contraption. Just a lot of creative ways of moving small colored balls from one place to the other.