My son loves science, so Santa brought this. It ws fun to do, but it was messy. The liquid has nowhere to go but on the floor when the rocket takes off. We've put it away until the weather gets warmer so we can do this outside.
This is such a good product that my 8 year old Grandson was able to use it for his 3rd grade science project. Making subtle and not so subtle changes to the fuel mixture to see the difference in the amount of propulsion on each test run. It traveled between 65' and 127 feet on the test runs, it was great and he had a blast. You will need extra packets of the fuel from Mattel.