Using a paint brush or sponge, brush Modge Podge onto canvas after cutting and selecting your pictures. Layer back and forth between the Modge Podge and the pictures.
I took a lot of the pictures and wrapped them around the edges of the canvas to use up as much space and have as little canvas visible as possible. I will probably still go back and fill in areas.
You could have your kids join with you or even do this as a project on their own if they're a little older. If they're younger they can help you pick their favorite pictures to use. This was a great way to make "Art" for T's room while recycling...or upcycling...something I already had literally laying around the house. =) Cant beat free art!!