HEATKEYS

Geocaching is a treasure hunting game where you use a GPS to hide and seek containers with other participants in the activity. Geocaching.com is the listing service for geocaches around the world.

Math explained in easy language, plus puzzles, games, quizzes, worksheets and a forum. For K-12 kids, teachers and parents.

Binary Sudoku Puzzle game is a new logic puzzle which can be solved by placing zeros and ones on the play grid. A very addictive game!

Puzzles.COM - the world

This is a series of links to pages, which help you solve our (and other) puzzle caches. As a first tip, have a look at the solving puzzles section, which gives an overview of the whole thing and...

Logic problems and lateral thinking puzzles organized by difficulty and type

CS Unplugged is a collection of free learning activities that teach Computer Science through engaging games and puzzles that use cards, string, crayon...