1) Dragon Valley - Freefly- Hidden Caves - Check under the bridge, under the large waterfalls, and under the castle!
2) Dragon Valley - FreeFly - Fly Through the Arch (see what happens)

3) Dragon Valley - Panoramic - Wait for the Catapult to launch on the highest viewpoint
4) Volcano Island - Panoramic - Watch the Whale Eat the fish in the underwater scene.
5) Volcano Island - Panoramic - Wait at the Volcano edge to see what happens...

6) IceWold - FreeFly - See the Giant Whale in the Bay - Watch the birds follow the orca

7) IceWorld - FreeFly - Try Fireballing the crossbows to see what happens!

8) Crystal Cave - Shine your flashlight on the Eggs and the Sleeping Dragon
9) Crystal Cave - See the Bug crawling up the wall and by the eggs, watch it open.
10) Freefly - Cast the Spell and your baby will follow you around!

There are more - Post them in the comments!