Electronic Parts

• Digi-Key
• Pololu - Robotic parts and modules
• Smart Embedded Processors
• Futurlec has many low price parts
• Sparkfun Electronics
• Jameco

Solar Equipments

• Silicon Solar - flexible solar panels
• Harbor Freight - rechargeable batteries and solar items

Hobby

• Build RC Helicopter
• Parallax - Basic microcontrollers and many sensors