Just the thing for left over cardboard tubing - the stuff they use to pour concrete into to make pillars and supports for decks etc.(or buy it from a hardware store). It is easily cut to size using a jig saw. Cut wood circles for ends and a base 'cradle'. Cut out an opening the size and shape you desire. Papier mache over entire container. Attach a small hinge to the door. Paint or cover in leftover scraps of wallpaper or fabric, or decoupage favourite images. Varnish.
The best source ever for these is Sonoco in Brantford.