Pic 2: protective plastic cover. You just need something to cover the upper part of the motor shaft as the battery holder protects the lower part. I used half of the bottom of one of those round cases you get out of gumball machines. They have a cheapo ring or keychain or doll or s...
It appears that the original idea was to sell these products like gumballs from candy machines but the candy seems to have always been sold in cellophane tubes that line the candies up in a row. This is likely the reason that they were named Sixlets. The idea is that you could get six...