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Title: Work well and the kids love them
Review: These are a big hit during bath time with my 2 and 4 year old kids. They work just like described. The more water you add, the higher the pitch.We're currently working on blowing with "inside breaths" to make it more tolerable on me. If you're easily agitated, adding this to a small tiled room will not be calming ;). But the kids love them, so consider it for a special treat at least.
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