Valentine's Day Greeting Card - programmed with Scratch

With Valentine's Day coming up, this week I decided to do a fun little Scratch project with my child's class - make animated Valentine's Day greeting cards. The lesson plan is meant to introduce the kids to the following concepts:

1. create animation effects by changing the size of a sprite
2. make clones/ copies of a sprite
3. position a sprite at a random location 
4. provide background music for the animation

I made this sample skeletal program to use as a starting point.

There are 4 sprites in my sample program - Heart Face, Greeting, Balloon, and Heart.