Added new images.

docs/courses/csintro/booleans/activity.md

@@ -1,5 +1,7 @@
 # Activity: Double coin flipper
 
+![Example Board](/static/courses/csintro/booleans/fuzzies.jpg)
+
 Guide the students to create a program using Boolean variables and operators.
 We’ll use our pseudocode from the previous activity to code a double coin flipper program.
  

docs/courses/csintro/booleans/project.md

@@ -1,5 +1,7 @@
 # Project: Boolean
 
+![Two-Player Game Example Board](/static/courses/csintro/booleans/two-player.jpg)
+
 This is an assignment for students to come up with a micro:bit program that uses Boolean variables, Boolean operators, and possibly the random function. 
  
 ## Input

docs/courses/csintro/booleans/unplugged.md

@@ -13,7 +13,7 @@ What’s a common issue with coin tosses? Students may bring up issues of trust
  
 Here’s a solution... The double coin toss.
 
-![Two pennies showing heads and tails](/static/courses/csintro/booleans/two-coins.jpg)
+![Two pennies showing heads and tails](/static/courses/csintro/booleans/pennies.png)
 
 In a double coin toss, both people have a coin and they flip the coins at the same time.