More ideas from Kike
Make rubber mold with wood grain, then cast concrete. (I'll never do it, but it looks so cool!)

Concrete cast with a wood grain mold. Might make some interesting stepping stones.

Cómo+hacer+baldosas+de+mosaicos+para+tu+jardín+¡con+un+molde+de+pastel!+

Cómo+hacer+baldosas+de+mosaicos+para+tu+jardín+¡con+un+molde+de+pastel!+