Honestly, I don't remember. It's been a long while since I saw it in the site. And stupid me didn't save it on favorites. What I DO remember is that they were placed next to each other forming a sort of "path" that should be taken by the sitter. It is probable that they did have slots but I cannot affirm that... It is not really three-dimensional but gives the illusion of being 3D. This is what I was talking about. QUITE out of the ordinary. Wonder how it reads for the price is still WAY out of my range.... I found it
https://www.youtube.com/watch?feature=player_profilepage&v=r9YkFs2GBHE
So, you never actually tried reading with them.... May I ask why ? Is it unfriendly as a deck or a bit too convoluted ? What fascinated me even more than the 3D effect was the PATH to follow. THAT sold me there and then ! But I'm cheap and it is still only available through Amazon jp which charges both arms and legs for shipping. (mind you I live in South America 
)Thank you nicky and Debra for pitching in with comments !!!
Glad you found the deck you were looking for!
Alas it was not the one I was talking about, and now I can't find that one either!
It's a fairly normal deck, except the cards had slits cut out of each edge so you can build them in any direction like lego... but what is it called please?
