If or when I reach 100 subscribers on YouTube, I want to do something to celebrate it..But what?

To other people getting 1 or 100 subscribers doesn't mean a lot to them, but it should. Not many people appreciate that 1 viewer and 1 subscriber but I think that every person that views my videos and every subscriber I appreciate counts. Because in this world when you have no one to rely on, you'll have to rely on people you barely know. But the best part of that is getting interact and meet people you never knew before. It has also helped me with my bad communication skills and putting myself more out there. I still don't know what I want to do for when I reach that but I have a few ideas...Any suggestions?