Here's a little Japanese film I found on You Tube showing the construction of the Midori Rocket kit. It's almost hypnotic to watch: the precise movements and the slow Japanese voice make a great relaxer whilst having a beer! Besides, his skills are so much more better than mine so it's also a training video for me! This one looks so incredibly fiddly its untrue!
The rocket is the same design to that on the back of the JR21 and this non-21 Rocket Launcher toy
and the Lucky Lunar Probe 1
and a variety of rockets from Eastern Europe like this one
Anyone know the origin of this rocket design?