How it works
An in-app purchase is when you spend real money inside a game. Coins, eggs and outfits can cost real money from a grown-up's card, so a grown-up decides.
A mystery egg is chance: you pay first and find out what is inside later.
A timer, Only three left! and a friend saying hurry up are made to speed you up, and rushing is how people spend more.
Ask three questions: what do I get for the price, will I still want it next week, and could I earn it by playing?