The photo app to give kids a taste of what photo editing is all about without loosing the fun part. Within reason hear out the 5 examples when Prime Lenses are something to think about and that Luminance Masking Tool.
Typic Kids App:
While the editing requirements are a bit beyond a kids ability, this app will bring forth basic skills and fun ideas about editing their own images that they take.
Mastering Luminance Masks:
Between Channel Masks and the Luminance Mask it seems only fair that in this tutorial finding and selecting the tonal range you want to switch up should be in your control.
5 Reasons You Should Invest in a Prime Lens:
http://petapixel.com/2014/07/05/back-basics-5-reasons-beginners-invest-prime-lens/
Why? Would be the question that comes with the headline, however watch the video to understand exactly why you would think about changing over to Prime.
Kid apps, photo editing with the luminance tool and generally getting a feel for Prime Lenses is not an easy business. But keep coming back each week to see what we've brought to the attention of Image Effects, Filters, Masks and Other Image Processing Methods.