Find it in the mushaf: Surah As-Sajdah is surah 32. Find ayah 2. The key words la rayba fihi mean no doubt in it. The same words appear near the start of Surah Al-Baqarah. Rabb al-'alamin means Lord of all the worlds: humans, jinn, animals and everything that exists.
Fact: In Surah Al-Baqarah, which ayah also says this Book has no doubt in it?
Ages 5–8: Sure or not sure. Sort sentences into sure and not sure piles.
Ages 9–12: Worlds list. List all the different worlds you can think of that Allah is Lord of.
Finish with: "I found that it is ayah ___ of Al-Baqarah."