Yes You can use my idea for free! Steps:
1) Project bubble letters onto cardstock and trace out for your mural lettering to be perfect.
2) Trace onto the wall with black perm. marker.
3) Choose an educational theme to fill the letter with. I am an ART Teacher so I used 3 famous Artist replicas and did one classroom with full color replicas and the other witht he 3 primary colory in monochromatic coloring as a teaching tool.
4) Spray with clear outdoor spray paint !
** Paint the design with acrylic paints. You can do it! Have Fun- Renee artbyrenee.weebly.com