This is a great idea for a very simple DIY stacked wall shelf system. Use PRÄNT magazine and paper boxes from Ikea, combined with some painted accent colors and large Binder Clips to hold the boxes in place. Simple and inexpensive. However in our house, with tiny hands grabbing and pulling on everything we would probably go with a little sturdier connection strategy like screws or at least some industrial clamps, and it would need to be firmly attached to the wall so as to not be pulled over.
Via Livet Hemma (Life at Home)