Grass>

People need to touch it more everything else is lower tier.

Just pour some concrete or wet pour rubber around the tricky to mow areas that way the mowing contractor doesnt need to get out of his ride on with a string trimmer.

I remember having wood chip/mulch in my favorite playground in elementary.
When you fell you'd be pulling wood out of your skin.
Grass would be the best, pea gravel is good too if they're not throwing it like buck shot at people.

Oo yeah i remember the wood chip playgrounds
Surprisingly didnt hurt at all