First, you need to visit your friend’s Dino Park. To do this, go to the leftmost screen (BATTLE ARENA) and tap on the “RANKINGS” icon (the golden goblet). Tap on the “FRIENDS” tab and select the friend you want to visit. From the window that popped up, tap on “VISIT” button. At the bottom right corner, you will find the icon of a gift. Once you tap on it, you will automatically hide your gift somewhere in a park. Your friend has 24 hours to find it.
On each day, you can send one gift and receive three gifts from your friends.