Bad Piggies Ground Hog Day Level 1-9 is 3-starred in two steps. Build a three box cart, and place the soda bottles on each side of the vehicle. First, navigate your vehicle towards the finish line within the time limit. Boost your speed by using the soda. Finally, using the same contraption, navigate your vehicle to the star box on the left.
Note: Tap on the soda bottle to change the direction of the thrust.
If you have a different strategy for completing this level feel free to leave a comment below.
On my time run I used the 2nd soda bottle down underneath the contraption, between the two wheels.
to find the skull you can use both bottles