diff --git a/011-Children-Modularity/2d/rc_car.scad b/011-Children-Modularity/2d/rc_car.scad
new file mode 100644
index 0000000..37e6e6b
--- /dev/null
+++ b/011-Children-Modularity/2d/rc_car.scad
@@ -0,0 +1,16 @@
+module rc_car(base, tip, junction) {
+  polygon(points = [
+    [base[0]/2, base[1]/2],
+    [base[0]/2, -base[1]/2],
+    [tip[0]/2, -base[1]/2-junction],
+    [tip[0]/2, -base[1]/2-junction-tip[1]],
+    [-tip[0]/2, -base[1]/2-junction-tip[1]],
+    [-tip[0]/2, -base[1]/2-junction],
+    [-base[0]/2, -base[1]/2],
+    [-base[0]/2, base[1]/2],
+    [-tip[0]/2, base[1]/2+junction],
+    [-tip[0]/2, base[1]/2+junction+tip[1]],
+    [tip[0]/2, base[1]/2+junction+tip[1]],
+    [tip[0]/2, base[1]/2+junction]
+  ]);
+}
diff --git a/011-Children-Modularity/3d/alveolar_reinforcement.scad b/011-Children-Modularity/3d/alveolar_reinforcement.scad
new file mode 100644
index 0000000..8128bcf
--- /dev/null
+++ b/011-Children-Modularity/3d/alveolar_reinforcement.scad
@@ -0,0 +1,40 @@
+module alveolar_reinforcement(bounding_box, thickness, height, alveolus_size) {
+  xstep = 2 * cos(30) * (thickness + sqrt(3) * alveolus_size / 2);
+  ystep = sin(30) * (thickness + sqrt(3) * alveolus_size / 2);
+
+  xn = ceil((bounding_box[1][0] - bounding_box[0][0]) / xstep);
+  yn = ceil((bounding_box[1][1] - bounding_box[0][1]) / ystep);
+  origin = bounding_box[0];
+
+  // Bounding box debug
+  /*
+  #polygon(points = [
+    [bounding_box[0][0], bounding_box[0][1]],
+    [bounding_box[1][0], bounding_box[0][1]],
+    [bounding_box[1][0], bounding_box[1][1]],
+    [bounding_box[0][0], bounding_box[1][1]]
+  ]);
+  */
+
+  difference() {
+    linear_extrude(height = height) {
+      children();
+    }
+    for (y = [0:1:yn]) {
+      for (x = [0:1:xn]) {
+        posx = origin[0] + (x * xstep) + (y % 2) * xstep / 2;
+        posy = origin[1] + (y * ystep);
+        translate([posx, posy, height / 2 + thickness])
+          cylinder(d = alveolus_size, h = height - thickness, center = true, $fn = 6);
+      }
+    }
+  }
+
+  linear_extrude(height = height) {
+    difference() {
+      children();
+      offset(-thickness)
+        children();
+    }
+  }
+}
diff --git a/011-Children-Modularity/3d/square_reinforcement.scad b/011-Children-Modularity/3d/square_reinforcement.scad
new file mode 100644
index 0000000..80307b4
--- /dev/null
+++ b/011-Children-Modularity/3d/square_reinforcement.scad
@@ -0,0 +1,38 @@
+module square_reinforcement(bounding_box, thickness, height, alveolus_size) {
+  step = alveolus_size+thickness;
+  xn = ceil((bounding_box[1][0] - bounding_box[0][0]) / step);
+  yn = ceil((bounding_box[1][1] - bounding_box[0][1]) / step);
+  origin = bounding_box[0];
+
+  // Bounding box debug
+  /*
+  #polygon(points = [
+    [bounding_box[0][0], bounding_box[0][1]],
+    [bounding_box[1][0], bounding_box[0][1]],
+    [bounding_box[1][0], bounding_box[1][1]],
+    [bounding_box[0][0], bounding_box[1][1]]
+  ]);
+  */
+
+  difference() {
+    linear_extrude(height = height) {
+      children();
+    }
+    for (y = [0:1:yn]) {
+      for (x = [0:1:xn]) {
+        posx = origin[0] + (x * step);
+        posy = origin[1] + (y * step);
+        translate([posx, posy, height / 2 + thickness])
+          cube(size = [alveolus_size, alveolus_size, height - thickness], center = true);
+      }
+    }
+  }
+
+  linear_extrude(height = height) {
+    difference() {
+      children();
+      offset(-thickness)
+        children();
+    }
+  }
+}
diff --git a/011-Children-Modularity/main.scad b/011-Children-Modularity/main.scad
new file mode 100644
index 0000000..135546d
--- /dev/null
+++ b/011-Children-Modularity/main.scad
@@ -0,0 +1,21 @@
+use <3d/square_reinforcement.scad>
+use <3d/alveolar_reinforcement.scad>
+use <2d/rc_car.scad>
+
+// Size of the RC Car plate
+base = [135, 200];
+tip = [50, 50];
+junction = 25;
+
+// Compute the bounding box size
+size_x = base[0];
+size_y = base[1]+2*tip[1]+2*junction;
+bounding_box = [[-size_x/2, -size_y/2], [size_x/2, size_y/2]];
+
+translate([-100, 0, 0])
+  square_reinforcement(bounding_box = bounding_box, thickness = 2, height = 10, alveolus_size = 30)
+    rc_car(base, tip, junction);
+
+translate([100, 0, 0])
+  alveolar_reinforcement(bounding_box = bounding_box, thickness = 1, height = 10, alveolus_size = 15)
+    rc_car(base, tip, junction);