What the heck is this thing?

Mom got out a new toy. I can't figure it out but Simon REALLY likes it. She says it's a music box and you put jewelry in it. My grandma Mary got it for me to keep the necklace, bracelet, and ring my Grandma Nena got me. By the way, Grandma Nena, Mommy tried to put everything on again but the ring's still too big. The rest fits just right