Lots of interactive puzzles: Play Battleship, Othello, magic squares, sliding tile, and more.
Try to remember which ball came from which box.
Use arrow keys to move the ball through the maze.
Simple but very challenging game. Try to trap the mouse by building pillars around it.
Sudoku puzzles are a great way to stretch and organize your brain.
This is a wonderfully creative way of telling a simple story. When you reach the end, create your own Mobius Story ending...
This is an example of the word puzzles on this site (also called rebus puzzles). There are dozens of other puzzles. The sample above..."Forgive and Forget". (Four give and four get).