diff --git a/README.md b/README.md
index 1926a6d0d..ea0b40948 100644
--- a/README.md
+++ b/README.md
@@ -56,6 +56,18 @@ Or you can play in “creative mode” in which you can build almost anything in
 More help about the gameplay, blocks items and much more can be found from inside
 the game. You can access the help from your inventory menu.
 
+### Special blocks
+The following blocks are interesting for Creative Mode and for adventure
+map builders. They can not be obtained in-game or in the creative inventory.
+
+* Barrier: `mcl_core:barrier`
+* Command Block: `mesecons_commandblock:commandblock_off`
+* Monster Spawner (WIP): `mobs:spawner`
+* Huge mushroom blocks: See `mods/ITEMS/mcl_mushrooms/README.md`
+
+Use the `/giveme` chat command to obtain them. See the in-game help for
+an explanation.
+
 ## Installation
 This game requires [Minetest](http://minetest.net) 0.4.15 (or later) to run,
 so you need to install Minetest first. Only stable versions of Minetest are
diff --git a/mods/ITEMS/mcl_mushrooms/README.md b/mods/ITEMS/mcl_mushrooms/README.md
new file mode 100644
index 000000000..54e03b7e6
--- /dev/null
+++ b/mods/ITEMS/mcl_mushrooms/README.md
@@ -0,0 +1,26 @@
+This mod adds small and huge mushrooms. Small mushrooms like to spread in darkness.
+
+## Itemstrings for huge mushrooms
+You can obtain the huge mushroom blocks with the `give` or `giveme` commands.
+
+### Cap
+* Huge Red Mushroom Cap Top: `mcl_mushrooms:red_mushroom_block_cap_top`
+* Huge Red Mushroom Cap Corner: `mcl_mushrooms:red_mushroom_block_cap_corner`
+* Huge Red Mushroom Cap Side: `mcl_mushrooms:red_mushroom_block_cap_side`
+* Huge Brown Mushroom Cap Top: `mcl_mushrooms:brown_mushroom_block_cap_top`
+* Huge Brown Mushroom Cap Corner: `mcl_mushrooms:brown_mushroom_block_cap_corner`
+* Huge Brown Mushroom Cap Side: `mcl_mushrooms:brown_mushroom_block_cap_side`
+
+### Pores
+* Huge Red Mushroom Pores: `mcl_mushrooms:red_mushroom_block_pores_full`
+* Huge Brown Mushroom Pores: `mcl_mushrooms:brown_mushroom_block_pores_full`
+
+### Stem
+* Huge Red Mushroom Stem `mcl_mushrooms:red_mushroom_block_stem`
+* Huge Brown Mushroom Stem `mcl_mushrooms:brown_mushroom_block_stem`
+
+## Unnatural
+* Huge Red Mushroom All-Faces Cap: `mcl_mushrooms:red_mushroom_block_cap_full`
+* Huge Red Mushroom All-Faces Stem: `mcl_mushrooms:red_mushroom_block_stem_full`
+* Huge Brown Mushroom All-Faces Cap: `mcl_mushrooms:brown_mushroom_block_cap_full`
+* Huge Brown Mushroom All-Faces Stem: `mcl_mushrooms:brown_mushroom_block_stem_full`