Harry Potter Wallpaper

This is such a great piece! Is there any chance I could use it in a google slide show? With credit to you of course! I work at a library in Colorado and I am doing a digital Harry Potter trivia for teens soon, on HP's birthday July 31st actually. I can promise it will only be used once and then I can delete it from the slide show. No worries if not, I totally understand but I figured it was worth asking.