Is it too simple or too formal to talk like this?

When I was 5 years old, my grandfather bought an accordion as a toy for me. It was red. Although the accordion had only 8 keys and 20 bases, it was enough for me. I loved it very much. I used it to learn my first melody “twinkle, twinkle, little star”. Since I learned this song, all my little friends liked to play with me. I usually used my little accordion to play this melody for them and my friends clapped their hands while they sang this song. This was my happiest memories of childhood. It had a profound influence in my future and I developed a great interest in the music since then. Later I had a real accordion and began to perform on stages at my 15 years old.