ski

Need some handyman advice - anyone savvy with the Lowe's/Home Depot world.

I am planning to build an 8'x8' floor on top of hardwood flooring in my apartment. Since I'm on the bottom floor, the floor is very solid underneath, and I want a little bit of "give".

My idea:



What is a material I can put in between the slick linoleum/vinyl surface and my floor that is:
- Soft
- Not too expensive and can find it at a store
- Able to grip the hardwood floor beneath and the slick surface on top?

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