Most of them do reward just some gold, but there are also those giving toys, mounts or an Ultimate Battle-Training Stone.
Toys -- Buy an item X somewhere in Dalaran for one of your hatchlings:
- Sharptalon Bonding -- Dirty Spoon
- Bloodgazer Bonding -- Purple Blossom
- Snowfeather Bonding -- Tiny Pack
Mounts -- Return a hatchling to the place of its origin [and take care of the clutch matriarch?]:
- Snowfeather Reunion -- Snowfeather Hunter
- Bloodgazer Reunion (not found in the database, but confirmed in the mount's description) -- Predatory Bloodgazer
- Sharptalon Reunion -- Viridian Sharptalon
Ultimate Battle-Training Stone -- Defeat raid bosses with your hatchling out:
- Teamwork Lesson: Skorpyron (Bloodgazer)
- Teamwork Lesson: Ursos (Snowfeather)
- Teamwork Lesson: Xavius (Sharptalon)
Being cynical about the raiding community, I should tell I could already imagine Falcosauros boosts spam despite LFR. Also note the first letters of the bosses in the mentioned order.
But hey, that was supposed to be an informational post, okay?
The assumed full quest path was apparently posted by Quintessence during PTR, and these quests are mentioned on WH aswell, but I'm not sure about their exact order. Does anyone know?