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Bueno

My daughter loved this kit. Easy to use!

I chose this because not everything was perfect inside of the kit, but I believe that it was a very useful kit for me and my partner in this past science fair.

We have tested this product with both the suggested dirty water and water colored with food coloring and it worked on both cases. It should be noted however that the filtering materials are vert small quantities, so using a big amount of water dirt or colors will make it less efficient faster. I would suggest to do the test with small amounts, I think 50 ml is more the enough to demonstrate the principle. For the dyed water I ended up using only 20 ml. My daughter used it for her science project and it was very fun for her to do and she assemble it herself with my guidance to explain the instructions. She is first grade so I do not think it is very challenging bu fun and educating to observe. I added a video of the assembly and the final product and function. I would suggest to use a heavy glass container as a collector as they suggested because it was too flimsy when my daughter used a plastic cup and needed to add a support cup as seen in the end of the video.

This was and is awesome! My 6-year-old son hubby loved it and worked on it during his science fair last year. It's easy to construct and fascinating to watch. When we set it up at the science fair, it was shredded quickly by those bunch of kids but I was able to salvage it. Basically, everything that was suppose to go in the containers ended up on the floor and the containers were put in all kinds of wrong positions. In the end, it still gets 5 stars because if you are at a science fair that's NO TOUCHING, this thing is sure to win for the little ones. P.S. I had to do all the writing. My 1st grader was USELESS with the scientific part. He just liked watching the dirty water become clean. =^(