To send a gift, tap the Gift button in the bottom menu → choose a gift and the friend you want to send it to. You can also send a gift through the Neighbors menu. To open the Neighbors menu, tap the Sociality button (the button with 3 people in the bottom menu) → tap another button with 3 people. To send a gift, choose the Neighbors tab → tap Send a Gift and choose a gift. Note that you can send 20 free gifts a day and you can't send more than 1 free gift to each neighbor per day.