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Title: Total Dud
Review: The learning materials in this product are excellent and descriptive. And in theory, it should work great. In order to work, the rocket must seal very tightly to the base while the air pressure from the reaction of the baking soda and vinegar builds up. But it doesn't--in fact, it leaks like a sieve and the only reaction we witnessed took place as the bubbles oozed out the side. I rated it high for durability because once the "blast-off" moment is a dud, the thing is almost impossible to pull apart so that you can try it again! I would have taken it back to the store, but we bought it too long ago. Severely disappointed little boys at my house.
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