To unlock the Sound Board, earn 3 stars on every level in worlds 1-3

To use the green bird easily, launch it backwards and tap the screen before it leaves your view and it will fly like the rest of the birds.

In the menu, click the settings tab then the I icon. Now scroll down until you find the golden egg.

Find the following Golden Eggs by performing the corresponding tasks:

GOLDEN EGG - HOW TO UNLOCK
Golden Egg 01 - Get 3 stars in worlds 4-5
Golden Egg 02 - Tap the sun on the select screen
Golden Egg 03 - Tap the egg at the end of the credits
Golden Egg 04 - Go to the help screen and tap the egg at the end
Golden Egg 05 - In Level 1-8, tap the out of reach chest
Golden Egg 06 - In Level 2-2, bust the beach ball
Golden Egg 07 - In Level 4-7,tap the egg at the very top right of the map
Golden Egg 08 - In Level 5-19, on the top right of the left tower
Golden Egg 09 - In Level 6-14, bust the yellow balloon
Golden Egg 10 - In level 6-14 bust the yellow balloon in the lower right corner
Golden Egg 11 - In theme 8's level page, brush the screen right to left to reveal a golden egg
Golden Egg 12 - Get 3 stars for every level in Danger Above
Golden Egg 13 - In level 8-15 break the boxes in the far left corner
Golden Egg 14 - In level 9-14 fire the boomerang bird at the hat on the far right side of the screen on the small cliff.
Golden Egg 15 - Bust the rubber duck in the bottom left side In 10-3
Golden Egg 16 - Get three stars on all levels in the Big Setup

When you can use the big red bird, take out the slingshot. Tap the screen when the red bird is in the air to make a sound.