I'm an example of a new Icehouse player. Last year some time I bought a single Treehouse set at a local store. Later on I got Martian Coasters. Early this year I ordered 2 more Rainbow sets and a grey stash from the Labs along with my deluxe WW5 board (I used my discount), and the 3House booklet. Finally late last month I ordered two more Rainbow sets and the Playing with Pyramids book, from an online business that had a nice price on Treehouse sets (I ordered something else from them first and then noticed the Treehouses prices). Gradually, I plan to get Pink Treehouse and 5 stashes of Xeno Treehouse. Yesterday, with school canceled because of snow, I played several games from Playing with Pyramids with my daughter -- first time for either of us -- including Volcano! We then repacked them all as monochrome stashes, which is more convenient for some games, less convenient for others. I'm all in favor of the Treehouse selling scheme. My only suggestion is to add another small folded up paper inside to mention the other Icehouse games -- a brief summary of what's currently on the Treehouse main page. (Now that I look at it again, I see that I followed their suggested expansion scheme exactly.) If I hadn't been a LL fan already, I wouldn't have know about the expandability of Treehouse from the game itself; I probably would have thought "Cute little game, but I won't pull it out very often." Bryan