Just place on a flat surface and step on to secure them to the ground.
And because they are plastic, they are a fraction of the price and frustration. Each piece measures a large 16 Inch x 16 Inch area which is plenty for stepping and it doesn't take many to cover a large space.16inx16in Stepping Stones, Natural Pavers, Patios Walkways Dog Kennels, Gray, 12PK Create patios, pathways, barbecue pads, lawn and garden accents, dog kennels and much more! Instead of stone or cement pads, these plastic pavers can withstand heavy impacts, weight and harsh weather conditions. These heavy duty patio pavers by EMSCO Group are made of high density polyethylene plastic for durability in any application.