How stuff works turns two toilet paper rolls into binoculars by painting them black, taping with yellow tape, gluing together with wooden beads and tying on a string.
Good for ages 6 and up.
Get the instructions here:
Mom to two posh lil divas has a similar tutorial, except she painting the toilet paper rolls a more vibrant color and wraps them in pretty paper.
Get the instructions here:
http://www.momto2poshlildivas.com/2012/06/summer-fun-tp-roll-binoculars-nature.html
Our big earth has a version as well using rubber bands to secure the binoculars.
Get the instructions here:
http://www.ourbigearth.com/2009/04/21/earth-day-crafts-binoculars-mini-journals/
Tutu tea parties makes a bare bones version.
Get the instructions here:
http://www.tutusteaparties.com/2011/12/diy-childrens-binoculars-using-tp-rolls.html
Pink stripey socks makes them look like sharks by painting them blue and giving them fins, teeth and eyes.
Get the instructions here:
http://www.pinkstripeysocks.com/2015/02/toilet-roll-shark-binoculars-kids-craft.html
Crafts by amanda makes hers camouflage.
Get the instructions here:
http://craftsbyamanda.com/cardboard-tube-binoculars/