With these growing coins in a gold bar, your treasure chest will soon be filled! Instructions: Step 1: Place the gold bar in a container with warm water. The water temperature must be at least 35 degrees Celsius. Step 2: The gold bar will slowly break open within 24-48 hours and the coins will appear. Step 3: Add new warm water once the gold bar has completely broken. The gold coins will grow larger within 48-72 hours. Step 4: After 72 hours, you can place the gold coins in a larger container so that they can grow even more. Contents: 1 Treasure chest, 1 Gold bar, and 3 coins.