Get the message across with a repurposed cookie sheet.
Measure the back of your cookie sheet and cut a piece of shelf liner that's an inch wider and an inch taller. Stick the shelf liner to the back of the cookie sheet by peeling off one corner of the liner and laying it down on a corner of the cookie sheet. Slowly pull the backing away as you smooth the liner onto the sheet. Cut off the excess shelf liner.
To make a hole for hanging, place the cookie sheet over a piece of scrap wood and use a hammer to punch a nail through the center of the rim.
For the pencil holder, cut a piece of shelf liner that's about an inch taller than the can. Wrap the liner around the can so that the ends overlap a bit, then cut off the excess liner. Glue two magnets to the side of the can.
For the bottle-cap magnets, glue a magnet inside of each cap. Cut a piece of card stock to fit the cap, write a name on it, and glue it on top of the magnet.