Needle nose pliers, screw driver, drill.
jump rope (the one that has metal bearings)
an old dvd/cd player (computer or otherwise) from which you will scavage:
- motor, motor pulley, motor drive belt, rubber grommets
Erector set type metal strips
plastic coated hanger
two small wheels, beads, metal washers
9 volt battery and battery connector
one electric slide switch
Construction time: about 3 to 4 hours
Step 1: Jump Rope Wheel Bearing
Remove the end caps, push the rope out the open ends and cut them off.
You will be using both end caps and one of the handle tubes to make the wheel bearing.
Step 2: Cut the Bearing Parts
Do the same with the second end cap.
Cut about 1/2 inch from one of the remaining handles to use as the bearing center section.
Step 3: Making Bearing and Bearing Retainers
Cut a piece of coat hanger to help build the bearing and retainer parts.
Use one of the 5 hole Erector set metal strips and bend in the approximate shape as the left retainer.
Use one of the prebent (or bend a 5 hole Erector set strip) for the right retainer.
Drill a small hole in the center of each end end cap so that they will just slide onto the piece of coat hanger.
Now you have all the components for the wheel bearing and retainers.