08/07/2024
Today, studying new knob gear (#5405). This is quite useful. 今日は新しい十字ギアの研究。これは使える。
08/05/2024
Today, I'm playing with a buzz saw button spinner made from a wheel. Make sure to use a sturdy string. 今日はホイール […]
08/02/2024
Today's study is a big gyroscope. It is very effective, but fragile and dangerous. Good children should not im […]
