crazy 4 years, 3 months ago on Ready, set, go!

It sounds like you are a little upset because you might have lost? My son's derby race had a lot of quality cars that were built from the block of wood they were given, and one of those cars won the race. Maybe some parents and child are able to make a car better than others. Until you could actually confirm that they did that, it would be more respectful to not to accuse the kids of doing that.