Stacking Shields. You can stack up to 32 shields for a total of 64 steppers or 128 DC motors, or ....[insert your function here]! The only thing to watch for when stacking shields is every shield must have a unique I2C address. The default address is 0x60. You can adjust the address of the shields to range from 0x60 to 0x80 for a total of 32 unique addresses. (this is the explanation for Adafruit boards, it would be similar for arduino)
Wearable Tech – LilyPad Arduino Intro | Beginners guide to the LilyPad Arduino for wearable technology. During the course of the day you will be introduced to the basics of soft circuitry, some basic electronics, Arduino software, programming, and reading a sensor. At the end of the day you will have a functioning interactive patch, which you can sew onto a garment, bag or cushion cover.