ToysForTheBrain - Puzzles, brain teasers, riddles, enigmas

Link: ToysForTheBrain - Puzzles, brain teasers, riddles, enigmas.
According to the folks at ToysForTheBrain,  their goal is:

" to create the biggest set of quality riddle, brain teaser and enigma on the net. "Everything your brain needs to have fun."

The site has a lot going for it. Here is how they describe what's there:

To be certain to offer net surfers puzzles of the highest quality, users can rate each puzzle for the level of difficulty and for how much fun it was to solve. Visitors are highly encouraged to add new brain teasers to the site, including their own. There is also a forum where people can exchange advices, commentary or simply experiences.

Multiple category of puzzles can be found on the site; Riddles, Stories, Math, With Picture, With Object, Series, User Submitted. There is also a challenge section containing a series of very difficult questions that require a multiple set of skills from different categories.

You can visit the site through the link at the top of this post.