I used to make multi-level forts for my parakeet to hang out in, with the cardboard from cereal boxes. I could even make functional ladders to each level (parakeets can use those well). I too had a tape fixation. I can smell masking tape in my mind's nose. Somehow it's a good smell. I like it. They're going to find me gone crazy at age 55+, curled up somewhere, wiffing a roll of masking tape.