When a Monster wants to have one of their Needs met, an icon will appear next to them on the Home screen. For instance, when a Monster is hungry, a fork and knife icon will appear next to them. Tapping on the icon will show the monster, and give the player the opportunity to satisfy the Need by buying a Need Item.
The lower the level of the Monster, the less time it takes before their next Need must be satisfied. The experience earned by giving Need Items to Monsters can be increased by using Boosters.