There is no one answer to this question since every family is different and has different preferences. However, generally speaking, it is beneficial for children to have a hardback or leather Bible. This type of Bible is often more durable and can withstand more wear and tear, which is ideal for kids who are still learning how to take care of their belongings. Additionally, hardback or leather Bibles usually have nicer illustrations and features that can help make God's Word come alive for kids. Ultimately, it's up to each individual family to decide what type of Bible is best for their children.