If you can get your hands on an indoor blimp inflated with helium, then the next step is to add a propulsion system and remote control, and an example of this has been documented by Instructables member "masynmachien". By creating large fins that are controlled by micro servos, and putting one on each side of blimp - it can "swim" through the air at a sedate pace. Plus with the servos being controlled by a bare Arduino-compatible circuit it was easy to add remote-control via infra-red. At first it sounded a little far-fetched, but it works - for example:
If you're making your own blimp or other Arduino-based project and don't want to banish an entire board - instead get yourself an ATmega328 preloaded with the Arduino bootloader:
This is the same Atmel AVR ATmega328P microcontroller used in the official Arduino Uno, as well as our Eleven, EtherTen, USBDroid, and other boards. Perfect for building your own Arduino-compatible project directly on a breadboard or on a custom PCB, or for replacing the MCU in an existing board. For more information to order, click here.