Here’s a nice moderncat IKEA hack from Joachim in Stockholm. The project uses the good old Bjarnum brackets and Jarpen shelves (in oak) topped off with pieces of an IKEA wool carpet. On the very top shelf sits an IKEA Bastis cat bed, which is, I’m guessing, the most coveted spot in the house. - from www.moderncat.net

This work totally inspired me to come up with a specific building plan for Hani to move by jumping up&down shelves. One thing I will add to this idea is overlaying a ‘numeric keyboard’ (from mobile phones) interface onto shelf wall.