Here is my triple combo picture. I combined these three images to symbolize something I loved doing in my childhood: running and jumping into the pool while trying to catch a ball. This combines a baseball player sliding into the pool while catching a blow up basketball. From far away one might not see anything too outlandish with this photo, but as you come closer you can see the slightly off base imagery.
The Pixlr software was initially challenging to use and I had difficulty resizing images, but after awhile I got the hang of it.
Here are the sources for my images: