I've been looking for low-cost sources for my Arduino workshops and students, and that has grown into an online store:http://www.arduino-direct.com/sunshop/
I have been working on Educational materials for Arduino and that is the main website: http://yourduino.com
YourDuino is the creation of Terry King and Jun Peng. This is a partnership and collaboration between two friends: An old Engineer from the USA, now living in Saudi Arabia, and a young man from China who is contributing his energy and his knowledge of the Chinese markets to bring you interesting, high-quality products at low cost. We'll have more news as we get going more, but a first emphasis has been on Electronic Bricks because I find them so useful in Workshops/Classes where we want to concentrate on ideas and code rather than whether the right connections are working on 8 breadboards at once... And we have fortunately found the originator of Electronic Bricks in Beijing and he is collaborating with us on getting good documentation and examples on out site. This is a work in progress and I have lots more to do on that.
"Electronic Bricks" for Arduino are quite small circuit boards with various components like pushbuttons, sensors for light, sound, infrared signals, temperature, etc. or output devices like LEDs, beepers and more. Bricks have a connector for low-cost cables (15 cents each) that can plug right into an Arduino via a "Sensor Shield". Take a look here: http://yourduino.com/ElectronicBricks1.htm
Electronic Bricks are especially good for beginners and class situations where you'd like to be really sure about your connections and concentrate on designing software sketches and higher-
level systems. There are over 40 types of bricks available, and you can see many examples here: http://arduino-direct.com/sunshop/index.php?l=product_list&c=5
There are also high-function bricks like an Ethernet interface, clock-calendar, motion-detector, audio playback, EEPROM and SD Card storage and various wireless communications modules. A starter set of 12 bricks is shown here: http://arduino-direct.com/sunshop/index.php?l=product_detail&p=148
More bricks are being designed and there is a prototype brick to help you make your own.. Please email me with suggestions for future bricks or similar products.
Regards, Terry King