Best idea EVER for a kids' birthday party. Make a simple green screen photo booth with an app and sheet. We did this for a Star Wars party, but it would also be amazing to have a Frozen party with the girls singing "Let it Go" in front of the ice castle!
If you aren't taking advantage of green screen to add depth to project-based learning in your classroom, then you will want to read this primer on how to get started. In this entry, we take the direct route to inexpensive green screen tools and offer real examples from classrooms.