- two pieces of plywood measuring 16 cm by 12 cm
- little stack of white sheets measuring 14 cm by 11 cm
- hand drill
- markers or paint/brushes
- bit of rope
Place one of the sheets on the painted shelf and mark off where the holes should be. Keep away about 1 cm from the (short) side. Do the same with the second shelf. Drill holes with a hand drill. Place the sheets on the lower shelf and then put the painted shelf on top of it. String a piece of rope through all the layers and bind them together.