A wild number is like a magical number that can change and grow in different ways. It's like having a toy that you can play with and shape into many different forms. Sometimes, wild numbers can get really big, and sometimes they can get really small. They can also change depending on what other numbers they are with. It's like having a chameleon, who can change its color to blend in with different surroundings. With a wild number, you never know what you're going to get!