Rocker Cutter（ロッカーカッター） ─ A utility knife first appear in Japanese cartoon Doraemon in 1990, which can carve out different size of room out of any given plan.    

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Those narrows stairs built between shops have always catch my attention, it's hard to not think about what mysterious cases they might lead me to. So, i simply captured the images of those stairs and tried to project those image to wall hoping to create a portal, just like the Anywhere Door (どこでもドア) in Doraemon.