We strive to maintain high levels of quality control with the creation of all our designs. Any use of an item outside the recommended (or tested) methods void any warranty or expectations from One Man, One Garage. Buyers are responsible for all safety concerns with the use of small parts around children to avoid choking hazards. Adult supervision is recommended and encouraged to enjoy our kits to the most! Be cautious with fire, especially indoors. Never leave flames unattended.