a fun technique...gesso, magazine images, watercolor paints and alcohol...you can make collages even if you don't have alot of supplies!
amazon links to things i used in this video...
modpodge- http://amzn.to/2hPLj5s
gesso- http://amzn.to/2i0mOPB
watercolor paints- http://amzn.to/2CL6FXh
stabilo- http://amzn.to/2B9VMhe
91% alcohol- http://amzn.to/2AVfr3S
gelatos-http://amzn.to/2jIgWem