diff --git a/concept/Levels.txt b/concept/Levels.txt
index 328d49f..3cc4a88 100644
--- a/concept/Levels.txt
+++ b/concept/Levels.txt
@@ -18,14 +18,17 @@ Task 5: Build-a-bridge 'n' press a button.
 
 *** Level 2 ***
 
-
+One large room with two 9x9 pads: One measures the sum the other the product of
+the boxes. One weight of two 2x2 pads, indicating which pad carries the heavier
+load.
 
 2 -> 3: Staircase
 
 *** Level 3 ***
 
-Colour-stones 
+Colour-stones, 10x10 matrix, 4 wells in each corner.
 
 3 -> 4: Lift
 
 *** Level 4 ***
+
diff --git a/concept/puzzle-drawings/level2-weight.png b/concept/puzzle-drawings/level2-weight.png
index 6b81637..06835f7 100644
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diff --git a/concept/puzzle-drawings/level4.png b/concept/puzzle-drawings/level4.png
new file mode 100644
index 0000000..e8bc5f2
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