From the Giz Wiz. It runs on 3 AA batteries, not included. And the instructions don’t mention where the bubble mix goes, but it’s under the bell as I saw after I turned the locomotive around. Only on one side of the bell is there an arrow pointing up that says “open”. No where does it say open it and pour the bubble liquid in there, but that does make the Toy Locomotive blow a lot of bubbles. With music, lights and train sound effects, it’s great fun. Oh, and it’s ‘bump & go’. When it runs into something, it turns and goes in a different direction. About $20. Lots of vendors offer the same locomotive under different names.

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