Painted Monster Stones

Cocoa bean turns smooth pebbles into silly monsters using paint, makers and googly eyes.  The eyes could be drawn on as well.

Good for ages 5 and up.

Get the instructions here:
http://www.cocoa-bean.co.uk/users/blog/half-term-entertainment/

Coastal ways adds magnets to her version.

Get the instructions here:
http://coastalways.blogspot.com/2012/08/rock-monsters-pebble-magnet-tutorial.html

Princess Coloring Pages

Coloring 99 shares a litany of free Disney princess coloring page printables. 

Good for ages 2 and up.

Get the templates here:
http://www.coloring99.com/2013/05/disney-princess-coloring-pages.html

Make Your Own Hobby Horse

Mrs. king rocks shares a fantastic way to create a horse using a pool noodle, googly eyes, rope and felt for the mane.  You could draw on the eyes as well.

Good for ages 7 and up.

Get the instructions here:
http://mrskingrocks.blogspot.com/2012/07/making-swimming-noodle-ponies.html

Washi Beads

Zakka life shows how to make rectangle beads using washi tape and card stock.  Circle and triangle and trapazoids would be fun too.

Good for ages 5 and up.

Get the instructions here:
http://zakkalife.blogspot.com/2013/06/kid-craft-washi-tape-beads.html

Lion Cootie Catcher Puppet

A fun free fortune teller for kids.  It folds like a cootie catcher.  Kids can also use it as a puppet. The original host no longer has this project but it is still available on archive.org.

Good for ages 4 and up.

Get the template here:
https://web.archive.org/web/20130507105024/http://www.moodkids.nl/blog/~/media/Images/Blog/2011/DIY/JULI%202011/MoodKids%20DIY%20Print%20Zoutvaatje.ashx

Plastic Chihuly Inspired Bowls

Artchoo makes really neat Chihuly type bowls using plastic cups and sharpie markers and an oven to create the cool shapes.

Good for ages 2 and up.

Get the instructions here:
http://artchoo.com/chihuly-inspired-art/

Art with rmotta uses plastic sheets.

Get the instructions here:
http://artwithrmotta.blogspot.com/2010/09/can-you-say-chihuly.html

Pencil Crossbow

Imgur hosts a homemade crossbow using pencils, binder clips and rubber bands. 

Good for ages 12 and up.

Get the instructions here:
http://imgur.com/4xJig
and here:
http://www.reddit.com/r/pics/comments/13doig/functioning_crossbow_made_of_pencils_and_rubber/