Here are a couple of creative sites I've come across that share a multitude of ideas.

https://www.pinterest.com/pin/388013324115264560/ 

and 

http://savedbylovecreations.com/2012/04/50-button-crafts.html

You may even want to start collecting. There is a whole new world out there- http://www.nationalbuttonsociety.org/Home.html

I hope you can get some inspiration from them.

Love to all.