diff --git a/docs/projects/compass.md b/docs/projects/compass.md
index f22ffe04..38c6667c 100644
--- a/docs/projects/compass.md
+++ b/docs/projects/compass.md
@@ -10,12 +10,10 @@ Welcome! This guided tutorial will show you how to program a script that display
 
 ### ~
 
-
 ## Step 1
 
 Create a loop that will continuously update the reading of the compass.
 
-
 ```blocks
 basic.forever(() => {
     
diff --git a/docs/projects/flashing-heart.md b/docs/projects/flashing-heart.md
index 95f612b1..40be3ba3 100644
--- a/docs/projects/flashing-heart.md
+++ b/docs/projects/flashing-heart.md
@@ -2,8 +2,7 @@
 
 ### ~avatar avatar
 
-Use the LEDs to display a flashing heart, and then create
-an animation of a broken heart. :(
+Use the LEDs to display a flashing heart!
 
 ### ~
 
@@ -38,19 +37,19 @@ basic.clearScreen();
 
 ## Step 3
 
-Put a [forever loop](/reference/basic/forever) around it.
+Put a [forever loop](/reference/basic/forever) around it to repeat the animation.
 
 ```blocks
 basic.forever(() => {
-basic.showLeds(`
-    . # . # .
-    # # # # #
-    # # # # #
-    . # # # .
-    . . # . .`
-    );
-basic.pause(500);
-basic.clearScreen();
+    basic.showLeds(`
+        . # . # .
+        # # # # #
+        # # # # #
+        . # # # .
+        . . # . .`
+        );
+    basic.pause(500);
+    basic.clearScreen();
 })
 ```
 
@@ -60,45 +59,50 @@ Add a [pause](/reference/basic/pause) to wait after clearing the screen.
 
 ```blocks
 basic.forever(() => {
-basic.showLeds(`
-    . # . # .
-    # # # # #
-    # # # # #
-    . # # # .
-    . . # . .`
-    );
-basic.pause(500);
-basic.clearScreen();
-basic.pause(500);
+    basic.showLeds(`
+        . # . # .
+        # # # # #
+        # # # # #
+        . # # # .
+        . . # . .`
+        );
+    basic.pause(500);
+    basic.clearScreen();
+    basic.pause(500);
 })
 ```
 
-## Step 5
+## Send your heartbeats over radio!
 
-Add a second image of a broken heart. 
+Do you have a second @boardname@ at hand? You could use radio and send your heartbeats to other
+@boardname@ and show a heart when you receive one.
 
+* move the code in the **forever** inside 
+a [on data packet received](/reference/radio/on-data-packet-received) handler. 
+The handler will run whenever a message is received from another @boardname@.
+* use [send number](/reference/radio/send-number) and [pause](/reference/basic/pause) 
+to broadcast a packet of data every second.
 
 ```blocks
 basic.forever(() => {
-basic.showLeds(`
-    . # . # .
-    # # # # #
-    # # # # #
-    . # # # .
-    . . # . .`
-    );
-basic.pause(500);
-basic.clearScreen();
-basic.pause(500);
-basic.showLeds(`
-    . # . # .
-    # . # # #
-    # . . . #
-    . # # # .
-    . . # . .`
-    );
-basic.pause(500);
-basic.clearScreen();
-basic.pause(500);
+    radio.sendNumber(0)
+    basic.pause(1000)
+})
+radio.onDataPacketReceived(({receivedNumber}) => {
+    basic.showLeds(`
+        . # . # .
+        # # # # #
+        # # # # #
+        . # # # .
+        . . # . .`);
+    basic.pause(500)
+    basic.clearScreen()
+    basic.pause(500)
 })
 ```
+
+Download the .hex file onto both @boardname@ and try it out!
+
+```package
+radio
+```
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diff --git a/docs/projects/smiley-buttons.md b/docs/projects/smiley-buttons.md
index f7eb51cb..20a65108 100644
--- a/docs/projects/smiley-buttons.md
+++ b/docs/projects/smiley-buttons.md
@@ -12,8 +12,8 @@ Use [show leds](/reference/basic/show-leds) to make a smiley face:
 
 ```blocks
 basic.showLeds(`
-    . # . # .
-    . # . # .
+    # # . # #
+    # # . # #
     . . . . .
     # . . . #
     . # # # .`
@@ -22,56 +22,89 @@ basic.showLeds(`
 
 ## Step 2
 
-Add an input block for when [button A is pressed](/reference/input/button-is-pressed), and put a
-frowny face inside it:
+Add an input block for when [button A is pressed](/reference/input/button-is-pressed), 
+and **move** the smiley face inside it:
 
 ```blocks
-basic.showLeds(`
-    . # . # .
-    . # . # .
-    . . . . .
-    # . . . #
-    . # # # .`
-    );
 input.onButtonPressed(Button.A, () => { 
     basic.showLeds(`
-        . # . # .
-        . # . # .
-        . . . . .
-        . # # # .
-        # . . . #`
-        );
-});
-```
-
-## Step 3
-
-Now add blocks so that when [button B is pressed](/reference/input/button-is-pressed), a smiley appears:
-
-```blocks
-basic.showLeds(`
-    . # . # .
-    . # . # .
-    . . . . .
-    # . . . #
-    . # # # .`
-    );
-input.onButtonPressed(Button.A, () => { 
-    basic.showLeds(`
-        . # . # .
-        . # . # .
-        . . . . .
-        . # # # .
-        # . . . #`
-        );
-});
-input.onButtonPressed(Button.B, () => { 
-    basic.showLeds(`
-        . # . # .
-        . # . # .
+        # # . # #
+        # # . # #
         . . . . .
         # . . . #
         . # # # .`
         );
 });
 ```
+
+Try pressing button A!
+
+## Step 3
+
+Now add blocks so that when [button B is pressed](/reference/input/on-button-pressed), 
+a frowney appears:
+
+```blocks
+input.onButtonPressed(Button.A, () => { 
+    basic.showLeds(`
+        # # . # #
+        # # . # #
+        . . . . .
+        # . . . #
+        . # # # .`
+        );
+});
+input.onButtonPressed(Button.B, () => { 
+    basic.showLeds(`
+        # # . # #
+        # # . # #
+        . . . . .
+        . # # # .
+        # . . . #`
+        );
+});
+```
+
+Try pressing ``A`` or ``B``!
+
+## Send your smileys over radio
+
+Do you have a second @boardname@ at hand? You could use radio and send your smileys or frownies to other
+@boardname@.
+
+Since radio can send numbers, we decide that ``0`` is the code for displaying a smiley 
+and ``1`` is the code for a frowney.
+
+Change your code as follows: 
+* [radio send number](/reference/radio/send-number) sends a number
+to any other @boardname@ in range
+* [radio on data packet received](/reference/radio/on-data-packet-received) runs code
+when data is received over radio
+
+```blocks
+input.onButtonPressed(Button.A, () => {
+    radio.sendNumber(0)
+})
+input.onButtonPressed(Button.B, () => {
+    radio.sendNumber(1)
+})
+radio.onDataPacketReceived(({receivedNumber}) => {
+    if (receivedNumber == 0) {
+        basic.showLeds(`
+            # # . # #
+            # # . # #
+            . . . . .
+            # . . . #
+            . # # # .
+            `)
+    } else {
+        basic.showLeds(`
+            # # . # #
+            # # . # #
+            . . . . .
+            . # # # .
+            # . . . #
+            `)
+    }
+})
+```
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