Click the Green Flag button to make the hero's dialogue appear. A separate sprite is used to place the speech bubble closer to the head. You can see the difference if you just click the SAY block inside the superhero sprite.
This project is from Chapter 2 of Scratch for Kids For Dummies which leads readers through creating their own comics by modifying sprites from the Scratch sprites library. It is a good introduction to the Scratch Bitmap Paint Editor.
