Hey all: Just got a new customer a few days ago, and around his children's swingset area are a bunch of boards. This kind: Anyway he tried to stack three of these boards on top of eachother all around the swingset area. This is about a 40' X 30' mulched in and he tried to put these boards as a "wall/buffer" from the mulch to the grass. A good idea, but he did nothing to make sure the boards stayed on top of eachother. No nails, drilling, nothing. So the wall that was constructed just fell apart. What would be the best way to fix this? There are just regular boards lying all over the ground. Nothing was done to them, no holes or anything. He said I could use the boards to fix the current wall, but how? I've seen boards conjoined together in other places. Drilled all the way through, my question is, what do you use to connect them and stablize them into the ground securely?