Like this idea - Scan childrens art work and then print out in smaller size. Now make art gallery in hallways of your childrens art:). Awesome idea, even for my grown young adults to have all of the kept keepsakes of their artwork in one frame.
Pushpins on foamboard. Trace your design first, buy twice as many pins as you think you'll need. If framing, cut foam board to frame first. - Cute way to use the push pins I bought for my DIY headboard and didn't end up using.
One of the common mistakes people make when hanging pictures or art work is hanging it too high. You'll read a lot of advice that says to hang your pictures at "eye level" but eye level for one person can be totally different than eye level for another