JUST SUBMERGE IN WATER: All your little one has to do is submerge the egg entirely in room temperature water. Within 12-24 hours the egg shell will break and the pet will begin to hatch. If the water level is low, add water. Always make sure the egg is completely submerged. UNIQUE SEA CREATURE INSIDE: Each egg will contain either a narwhal, Clownfish or shark! TEACH YOUR CHILD PATIENCE AND RESPONSIBILITY: Each surprise egg typically takes about 12 hours to grow in room temperature water. By allowing your child to submerge each egg in water themselves, they will learn how to monitor the water supply and take care of their new friend. INDIVIDUALLY PACKAGED: Since each egg is individually packaged, you can use each egg at your own pace. The individual packaging also allows for the eggs to be shared and given as gifts. FOR ANY OCCASION: Easter is right around the corner and these hatch and grow eggs are sure to amuse and entertain all. Don’t celebrate Easter? These eggs are suitable for birthday scavenger hunts and gifts as well.