Be careful when pushing and collecting parts. One wrong move renders the entire model unusable. Luckily we only had one break at the end. It was the hub of the tire so we were able to pierce it with a toothpick. Not exactly a children's project. I was able to work with my 10 year old son after explaining to him how fragile the parts were and working together as I stamped the parts and he assembled them and I then secured the assembly. In other words, he arranged the pieces and I arranged them. You have to rub the toothpicks. The printed instructions are confusing. The video helped, but a few steps weren't presented in the same order as the instructions. Take your time and this will be a worthwhile project.
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