Disclaimer: This is my daughter's car, so no comments about pink or the hearts, please!
Also, no pennies were harmed in the process of this Instructable!
Step 1: Supplies
- accurate scale.
- 3/4" drill bit and drill.
- some loose pennies.
- masking tape (optional).
- hot glue or epoxy (optional).
Step 2: Weight the Car
Weigh your car and then add pennies to the scale till you reach the desired weight.
I've been told there are two rules to the Derby:
- If your car is overweight, you are disqualified.
- If your car is underweight, you loose.
For our derby, 5 ounces was the limit, and her car started out at 4.5 oz, so we only needed to add five pennies to get close.
Yes, the car does say "I love you Dad and Mom" on the bottom. That makes it go faster.
Step 3: Drill Away
My daughter wanted her pennies mounted on top, but I would put them on the bottom if you want it them out of site. If you need to add a lot of weight, you could add more than one hole. Most people recommend placing the weight toward the back of the car.
Step 4: Add the Pennies
With the pennies a snug fit, and the hole on top, we didn't even bother with glue. You can get the pennies out by slapping the car against your hand. This would allow you to remove weight if the track scale show a different weight at the race). Your track official may require them be glued. The standard rule is no loose objects, so it is a judgment call.
As the final touch, we put a penny from the year she was born on top. You could also use a new penny to help remember when the event was in years to come.
Total cost (minus drill bit): $0.06
There is my two cents! As promised. Cheap and easy.
Hope this helps you out!