Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A Must Have

My grandson has been enthralled with this since he was a newborn. If he would start to fuss, my daughter would push the button for the music and back off to sleep he would go. Even now, at five months, if he wakes up in the middle of the night, she just pushes the button to turn on the music and lights, and he goes right back to sleep. She call it her "Miracle Toy"! I loved it so much I got him the swing and boucer, which he likes just as much.