Thames & Kosmos WindBots 6-IN-1 WIND-POWERED MACHINE KIT Experiment Manual page 10

Yay!
Let's start building!
Before you start building the models, you will build various modules.
These modules make it easier for you to build the models later, and
they are very useful when you want to convert one model into
another, as the modules will not have to be taken apart again.
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