I am selling some surplus molds for making ant nests to fit inside of the average dollar store picture frame. These are the same ones used in my tutorial on building a grout nest. You can use these to mold grout, hydrostone, plaster of paris, etc.
These wooden molds lightly peg together with a nail and an elastic band and are easy to pull apart to get your mold out.
1x 4x6" $8
3x 5x7" $10 each
Feel free to PM me for a shipping quote. I can ship them anywhere.