The document discusses the author's hobby of building Gundam model kits. It provides background on the Gundam series, which began as a manga in 1979. It describes the various grades of Gundam model kits available and notes that while they range from $20 to much higher, online retailers make them more accessible in the US. The author got into Gundam by watching anime shows and YouTube reviews, and has been building kits since age 15, finding it relaxing and a way to customize the models.