Teaching English can be difficult because unlike the sciences or math, language is often not quantitative. When teaching a child to make sentences, helping tools like word banks, or little pictures can help get a young child get started. It is unfair to assume that every child will learn how to make sentences at the same pace so patience is required. The more fun you make it, the faster the child will learn. But you can also impart a little knowledge on the side about the Nobel Quran by opening it and telling them a little bit about it and then point out the sentences are present in the Quran as well. The number indicate the end of the ayah (sentence) just like full stops. Simple and to the point.