This will move your 3D Printed turtle on the gears.
Step 1: The Gears
First 3D print your gears to make the turtle move.
Step 2: The Turtle
Then you print the turtle it is optional.
Step 3: The Platform
Then 3D print the platform and put the gears on them so they rotate the turtle
Step 4: The Platform and Gears
Put the gears were they fit on the platforms.
You should be able to rotate it with your finger.
Step 5: The Turtle on Platform and Gears
Lastly you put the turtle on the gears and rotate it with your finger and the turtle should move.