YouTube is so much more than a cat who is barking like a dog or beauty vloggers sharing the latest trends. Next to all the music videos, work-outs and cute animals there are a lot of YouTube channels that are educative and will actually make you smarter.
I'd like a tree like this and heart shapes cut out of paper. Guests can write their well-wishes for the couple on the hearts and attach to the tree with small clothespins. Later, the hearts could be put into an album or grouped together in a frame.