iPod nano Generation 2 (4 GB, green, 2006, unopened)

The iPod nano Generation 2 was available in 2 GB, 4 GB, or 8 GB flash memory capacities, capable of supporting either 500, 1000, or 2000 songs. In addition to songs, it could hold up to 25,000 photos on its 1.5 inch (diagonal) LCD display.

The 2 GB model was only available in silver; the 4 GB model was available in silver, green, blue, and pink; and the 8 GB model was only available in black.

Source: EveryMac.com

iPod nano Generation 5 (16 GB, blue, 2009)

The iPod nano Generation 5 was notable because of its impressive color choices. This model was available in nine colors: (PRODUCT) RED Special Edition, pink, orange, yellow, green, blue, purple, silver, and black. The finish for the generation 5 nano is glossy and the case is made of aluminum and glass. It was available with 8 GB or 16 GB of flash memory (2000 or 4000 songs).

This iPod nano also features a video camera with an integrated microphone and speaker that takes advantage of its high-quality 2.2″ TFT display (240×376, 204 ppi). The video quality is H.264 VGA 640×480 at 30 FPS with AAC audio, but it cannot take still photographs. This iPod also has a built-in FM Radio with “live pause,” allowing pause and rewind up to 15 minutes.

My example is blue, and I remember using it as a back-up/additional video camera that had surprisingly good audio for its size.

Source: EveryMac.com