Speaker cable lifters.

Vibration from music, cat noises, yer mama, police sirens, ocean waves, creepy footsteps of your impending doom, etc., are ever present in the air and no little elevators or tinker toys or anything else will stop that. The wires inside your speakers? Are they vibrating? Get in there and stop it! Tinker toys indeed.

I prefer Lincoln Logs. Don't laugh, they can n

be built up just like Tinker Toys!

#toddsyr.  I agree!  Lincoln logs will absorb more of those nasty vibrations.  Be sure and finish them with a neutral sounding wax.

Tried them and they only made it easier to dust the floor. They look neat but I am on a concrete slab with wood floors, did nothing for sound. But hey they may work for you. In comparison to other suggestions (fuses and the like) Tinker Toys, Lincoln Logs and wood blocks are cheap.  

The concept of cable "lifters" has an interesting history. They were apparently first proposed by Enid Lumley, a reviewer for TAS. This link adds a little more to the story:

https://positive-feedback.com/audio-discourse/bunking-cable-lifters/

It's a relatively inexpensive tweak to try. If you hear a difference in your system, in your room, with your ears, then that's all that really matters.