Somewhere between bloopers and conspiracy theories lies the place for interesting finds and easter eggs hidden in the show. Have you found something that could be listed? Tell me! ^_^
Book: Water || Book: Earth || Book: Fire
A full list of what is currently posted and links to those entries is below.
Book 1: Water
0x00 : Opening Credits Bender Identities
1x03 : Avatar Roku & Dragon shaped clouds
1x04 : Sokka's sewed-up pants continuity
1x08 : Dragon-shape in Firebending attack
1x10 : Aang co. do Charlie's Angels pose
1x11 & 12 : Sokka's foreshadowing
1x12 : Princess Azula's sneak appearance
1x19 : Pakku makes a reference to SpongeBob
1x20 : Sokka+Yue/Haku+Chihiro visual reference
Book 2: Earth
2x04 : Blue Spirit mask on cart
Book 3: Fire
3x01 : Jin and Hope family shown in Ba Sing Se scene
3x04 : Toph makes Nickelodeon logo in space earth