input question: How can I make a thread ball?

output answer: Knot one end of thread around a pencil and roll it up.

input question: To join two lengths of PVC pipe together, you can

output answer: Push them together until they snap into place

input question: How do you make a candle?

output answer:
Pour the wax into your double boiler and allow to melt for 10 to 15 minutes, stirring frequently. When your candle wax is melted, it's time to add fragrance oils. Follow the instructions on your wax package for how much to add. Simply pour it into your melted wax and stir for a few seconds.