Video ideas for my friends birthday! Help!!?

My best friend is in the Army, she's going to be 19 and in Washington State on her birthday. I want to make a video saying/creating "Happy birthday!" 10 different ways and make it into a video to send to her. I have the chalk on the sidewalk idea and cups in the fence to spell it out but I need 8 more! Helpppp me! It would be SO appreciated! Thank you :)