Scratching barrel aka Kitten Towers
Our two 8 month old cats love their scratching barrel. More for sleeping in/on than scratching but they now spend most evenings up their watching what we're up to. V. stable and less obtrusive than some cat trees.
Only down is that the dangling fluffy balls in the windows haven't lasted long. One was pulled off completely the other had the furry cover pulled off exposing a bell hanging on elastic so cut it off as could have been swallowing. Third (bottom window) is still attached for now!