The Book of Psalms is a special part of the Bible that is like a big collection of songs and poems. It has 150 different songs and each one is different. Some of the songs are happy and joyful, while others are sad and talk about feeling lonely or afraid. The people who wrote the songs were trying to talk to God and tell him how they were feeling in their hearts. They wanted to say thank you for good things that happened to them and ask for help when they were feeling sad or scared. The Book of Psalms is still really important to people today because it helps them feel close to God and express their own feelings and thoughts to him.