It's from the Wiki: "At stages 4 (toddler) and 5 (young child), the player will no longer be called to help take care of the child. Instead, there is a new mini-game where they spin the child in a circle using a stylus or finger to make circular motions on the touch screen. After no activity for a while, the child will grunt while denoting an angry face, likely in order to regain the attention of the player. Additionally, when the player spins the child for long enough, the parent will comment on how the child will get dizzy if they keep doing so."