Al-hamdu lillahi rabbil 'alamin

Okay kiddo, so in the religion of Islam, Muslims believe in one God who created the universe and everything in it. When Muslims say "al-hamdu lillahi rabbil 'alamin," they are praising and thanking God for being the Lord and Creator of everything in the world. It's like saying "thank you" to God for all the good things in our lives and recognizing that everything comes from Him. Think of it like when you say "thank you" to Mom and Dad for making you dinner or buying you a new toy. It's important to show gratitude and appreciation for the good things in our lives, and Muslims do that by saying "al-hamdu lillahi rabbil 'alamin."