Mini Van De Graaf... M & M style!

Step 2 Sphere, Pipe

I sanded the lovely paint job off of my M & M, punched a hole in the bottom and chewed it into a bigger hole (1", to fit the PVC pipe) using wire cutters. Definitely not a clean cut, but I hid my shoddy workmanship later under a halo of Gorilla Glue. Don't tell. Some nice tin snips would have been swell.

I cut a 7" length of PVC, just eyeballing the length compared to my rubber band. Longer or shorter, I didn't notice any info out there about whether the length of the belt (and therefore the housing) matters much.

I drilled a 1/4" hole through the pipe for the "bottom" roller, and a small hole near the top for the upper roller's "axle," made from wire hanger.

To make the top roller removable, I also drilled a bigger hole above the "wire" hole (on one side), large enough to admit the diameter of the finished roller (see step 3). I then cut a slot between the two holes, so the roller goes in at an angle, then snaps into place.