This activity was taken from the Noggin BuilderZ advanced activity book
1. Construct many little gear models
2. Connect the little gear module using 2 end pins
3. Join as many little gear models to become a gear train, it can be joined in different directions
When there are more than 2 gears, the gears in between is called an IDLER GEARS.
When more than 2 gears are joined together, it forms a gear train.
Gear trains can be use to change the direction of the DRIVEN gear direction