You can make sock puppets that look like the both of you and have them kiss.
Or maybe Have the both of you in a web chat and kissing the computer screen.
How about making an animated cartoon of the two of you kissing?
Or you can kiss while flossing as that would be pretty unique and a possibly fun challenge.
What about the two of you learning how to control your dreams and in the middle of your lucid dream you could kiss.
Hope this helps :D