Puzzle Master has a large and unique collection of brain teasers & puzzles for sale. In addition they also carry chess, mechanical banks, puzzle books, magic trick books, boomerangs, etc.

Passion for Puzzles Blog Passion for Puzzles is a fantastic site for all kinds of puzzles. You can find solutions for brain teasers. There is also a great section for online games and another section for daily online activities like crosswords, sudoku, word search etc.

IQ Test Prep

Stanford Binet IQ Test