Only the source was used. Please see in high res.

Built in ps 7.0

Adjust the source image to make a brighter scene. Draw the rainbow.
Adding the canoe image taken from http://www.sxc.hu/photo/655795. Thanks to ngould for the pic.

Let's go canoeing, catching the rainbow, and sing .. Imagine you and me .. ah, what a beautiful memory ;)

source and my Pics

Used image of girl - sxc.hu many thanks to binababy12 - selected her eyes and used a rainbow gradient and used mosaic filter to pixelate image.
All other images are source images from website and logos.