Can you use peel and stick carpet tile over existing carpet without ruining the existing

carpet?

A big area rug would be much less expensive than the peel and stick tiles, and if you buy one large enough, it can cover huge spaces. The sticky part of the tiles will leave a residue on the carpet that would be hard to get off.

Try a big, cushy rug like this  shag area rug or an animal print area rug. An 8 x 11 will cover a big space.