NIEHS Kids Page Brainteasers, Puzzles & Riddles --
http://www.niehs.nih.gov/kids/braint.htm

Riddles!
http://www.butlerwebs.com/jokes/riddles.htm

Riddles - The Best Riddles and Brain Teasers
http://www.onlyriddles.com/

Riddles at Just Riddles and More
http://www.justriddlesandmore.com/riddles.html

Riddles.com ~~~ BRAIN TEASERS ~~ FUNNY RIDDLES ~~ HARD RIDDLES ...
http://www.riddles.com/

Squigly's Jokes & Riddles for Kids
http://www.squiglysplayhouse.com/JokesAndRiddles/

Jokes and riddles
http://www.wxs.ca/jr/riddles.html