Inexpensive craft store frames fit perfectly around light switch covers! --I like the LOOK Expensive (but not really BE expensive! -- 31 Easy DIY Upgrades That Will Make Your Home Look More Expensive--
Hang a set of Pier White Multi-Strand Glimmer Strings:registered: to create a subtly glowing backdrop. They use tiny LEDs on a curtain of shapable, thread-sized silver filament strings to create a firefly-like effect indoors and in covered outdoor areas.
Note to self: remember this as an idea for cat friendly living room. Add dark rustic floating shelves on the side and create one long platform across the top. Add invisible floating shelves on adjacent walls for more kitty mobility.