Interactivity Puzzles Reflection

This activity on the scratch program was the most fun of any activity we have done so far.  I thought the sensing blocks that made certain sprites do things when they touched other sprites made the scene look very cool.  One of the three puzzles was making the dog bigger when the letter "b" is pressed and the dog smaller when the letter "s" is pressed.  The second puzzle was making the cat say excuse me when the dog bumped into the cat.  The final puzzle was making the dog change costume and color and run to the corner whenever it touched the cat.  The sensing blocks really make me think of how I could use them in my final project because they make the program so interactive.