I'm a big fan of building a picture wall using lots of frames and a similar motif. But sometimes it's easy to forget that a photo collage doesn't need to only use photographs. You can use magazine cut-outs, postcards, tree branches or even...felt cut-outs!
All you need is some felt (which can be purchased at any local craft store for practically pennies) and templates for cutting (think stencils or google and print out templates online). And if you are a bit too lazy or not at all crafty, you can buy pre-cut felt shapes. The Kutz shop at Etsy offers those deilcate butterfly cut-outs you see in the photos above and many other choices, all ranging from $1.50-$10 per piece.