I have several versions of that one, and I think they are great! They generally have in addition of the line of LEDs, one diode laser that makes a circle on the ground (I think your duck has it but it might need a darker room to show).
The first version of the concept I saw were wooden whip tops from China, 10 to 15 years ago, cheaply made, hollowed and hand stuffed with the electronics and hot glue. I was surprised they would a put laser diode on them, but I guess they had many surplus rejects that they needed to use for something. Those tops didn't have music. Later I got a nice aluminum Chinese whip top with the same light show, but I don't know which came first. The tops must have sold very well, because they started to make them out of plastic, and later replaced the whip top by spring started tops with music and lots of different shapes. I still see them in the supermarkets around here. After Beyblades, probably the most successful commercial top in recent times.
