Okay kiddo, I'm going to explain to you what "arich anpin" means, and I'm going to do it in a way you can understand!
So, "arich anpin" is actually a Hebrew term that comes from Jewish mysticism. It refers to a special aspect of God, which is sometimes compared to His "long face". This "long face" is supposed to represent God's patience and kindness towards us, since He is willing to give us lots of chances to do good and make things right.
Now, Jewish mystics believe that there are many different aspects of God, all of which have different qualities and personalities. Arich anpin is one of these aspects, and it's usually associated with the idea of mercy and forgiveness.
So, in a way, arich anpin is kind of like a superhero power that God has - it's something that makes Him even more powerful and special than He already is. And just like a superhero, arich anpin can help us when we're in trouble or need guidance. All we have to do is ask for it!