This Growth Egg XL Unicorn of over 20 centimeters grows into a unicorn with a size of more than 50 centimeters! How? Place the egg in cold water and wait 24 to 48 hours. Then the shell of the egg breaks and the unicorn grows. Make sure that the water always remains above the edge of the egg. Even if the unicorn has completely hatched from the Mega Growth Egg Dino, leave it in cold water. Until he is fully grown (after about 15 days)... and then you have a new unicorn friend!