Swingset update

Right now, I have a swingset that rests on grass and worn spots that get muddy every time it rains. I want to remove the grass from around it and fill it with wood chips.

My question is: is there some material that I have to put down below the wood chip layer such as stone or a barrier of some kind to restrict the regrowth of the grass or will the wood chips be enough?

Generally, a layer of weedblock fabric would do the trick. This is like a plastic, but it "breathes" and allows water to pass. you get it at HD or any garden shop

You might want to look into using sand instead of wood chips, far less injuries.
www.parentcentral.ca/parent/article/738919

Excellent advice. Thank you both.