Leandro Erlich's installation called Bâtiment now on display at Le 104 in Paris looks like so much fun. A gigantic mirror reflects a house which gives visitors the illusion that they can hang off ledges and if kids (or adults) want, they can even get their Spiderman crawl on. Buenos Aires based artist Leandro does brilliant work, I mentioned him in this post and think he is the ultimate artistic illusionist. Watch a little clip here to see how it is done. Amazing.