Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A must have

This is a "must have" in my opinion. The Ocean Wonders Aquarium was a shower gift. My daughter is almost 4 months old, and she has slept in her crib since she got home from the hospital. Because of the soft, soothing sounds of the Aquarium, she has never been fussy when it is bedtime, and we have been able to establish a ritual very easily. She watches it every night as she drifts off to sleep. My husband and I love watching her look at it as she tries to keep her eyes open. I think that every baby should have this little gadget!