Yes, I am very curious about the algebra tiles. I stared at them for a long time before I finally said, "Oh, what the heck! I'll give it a try." It seems like an interesting approach at least...

The cubes that we have--and they do look like the same idea as the Omnifix--are cubes with itty-bitty holes on 3 sides and itty-bitty pegs on the other 3 that fit together and hold a structure together. So they're really just blocks that "stick."

Kriston