This is a useful tool. It helps you to make a full screen on the text you type or emoticons you enter on your iPhone or iPad . In some specific situations, it may be useful. For example :
▪ Teach your children to read
▪ Use it to play some games at the party, such as, Charades
▪ When you pick up someone at the station(airport), it can be used as a welcome board. For instance, you can write the persons name on the iPad.
▪ It can also be used when you want to pass some information to someone in the bar, or classroom.
enjoy it.