Hi there,
I’m planning to start a project where I’ll be installing the Swing Slide Climb 1x1m x 20mm Shock Pad Rubber Pave.
The surface I’m working with is hard soil, and I would like to know what kind of base I should use to properly level and secure the pavers.

Ideally, I’d prefer not to use concrete as the base, but something that’s easier to install.
Thank you in advance!