Because they enjoy life's simplest pleasures, toddlers have a strong affinity for everyday objects like keys, door stops, and pretty much anything that makes a funny noise or fits in their mouths. So one father had the brilliant idea to put all these objects together into a control board for a child's sensory delight, presumably to keep the kid occupied while the dad went and did dad-stuff like shop for hammers online and re-watch Band of Brothers.
Finally, all the stuff in your junk drawer can be put to a good use by nailing it to a board and letting your toddler have at it. Say sayonara, Toys "R" Us market share!
Before any of you dads head to Home Depot to recreate this, here's an inspirational Band of Brothers montage to hype you up before the trip.