Would this be good for a kid's playroom? Have hardwood and looking for easy clean up cushioning to add.

Our 3/4" Extreme Mats can be used as flooring in a kid's playroom, but we wouldn't recommend using them. These mats do have a pretty strong rubber smell, as they were initially designed for outdoor use. Also, these mats are somewhat porous, so they can be a little hard to keep clean. For playrooms, we recommend using our Foam Tile flooring. These are non-porous and are very easy to clean. We have tiles from 1/2" to 1" thick.