Who doesn't love comfy things for their feet? These have a large surface that will be easy enough for new climbers to stand on in a pair of too-big shoes, but then are also slopey enough that when set on a steeper wall, pressure and body tension will be very much required to keep your feet on. These are also big enough to work wonderfully as small slopey handholds.
Recommended hardware: 20x 1.5" Socket Head bolts