diff --git a/docs/tools/materials.md b/docs/tools/materials.md
index 0ca6a0e1430833913345ba4c4b65f0997153d3ff..9971c064667df6fae9e1f7925ee4f4c9e5e6e2f9 100644
--- a/docs/tools/materials.md
+++ b/docs/tools/materials.md
@@ -74,6 +74,7 @@ OPTIONAL:
 - Gelatine
 - Glycerine
 - Textile Hardener
+- Blocks of wood for CNC milling
 - Alum
 - Epsom salts
 - Borax