diff --git a/006-Modules/assembly.scad b/006-Modules/assembly.scad
new file mode 100644
index 0000000..5b87d2e
--- /dev/null
+++ b/006-Modules/assembly.scad
@@ -0,0 +1,6 @@
+use <bolt.scad>
+use <washer.scad>
+
+washer(d=12,h=3);
+translate([0,0,-7.5])
+  bolt(d=12,h=50);
diff --git a/006-Modules/bolt.scad b/006-Modules/bolt.scad
new file mode 100644
index 0000000..0e30a83
--- /dev/null
+++ b/006-Modules/bolt.scad
@@ -0,0 +1,6 @@
+// Standard Bolt
+module bolt(d, h) {
+  cylinder(d=1.9 * d, h=d/2, $fn=6);
+  translate ([0,0,d/2])
+    cylinder(d=d, h=h);
+}
diff --git a/006-Modules/washer.scad b/006-Modules/washer.scad
new file mode 100644
index 0000000..bd69873
--- /dev/null
+++ b/006-Modules/washer.scad
@@ -0,0 +1,6 @@
+module washer(d, h) {
+  difference() {
+    cylinder(d=2*d, h=h, center=true);
+    cylinder(d=d+1, h=h+1, center=true);
+  }
+}
diff --git a/007-Hull/dice.scad b/007-Hull/dice.scad
new file mode 100644
index 0000000..694e59c
--- /dev/null
+++ b/007-Hull/dice.scad
@@ -0,0 +1,13 @@
+$fa=1;
+$fs=0.5;
+
+hull() {
+  translate([-10, -10, -10]) sphere(r=2);
+  translate([-10, -10, 10]) sphere(r=2);
+  translate([10, -10, 10]) sphere(r=2);
+  translate([10, -10, -10]) sphere(r=2);
+  translate([10, 10, -10]) sphere(r=2);
+  translate([10, 10, 10]) sphere(r=2);
+  translate([-10, 10, 10]) sphere(r=2);
+  translate([-10, 10, -10]) sphere(r=2);
+}