You can simply decorate your child's room initially when they are very young....and as they grow older it can become a learning activity, it will teach them how to spell their name in a fun way.
You can also buy the whole set, and use it in kinder or school to teach the kids spelling activities.
Usually one buys the Front Engine, the Alphabet Letters you need and the End Train, but obviously you can purchase whatever you desire. All you have to do is to fill in the quantity you require next to each letter...and then press order.