i don't think homemade is any cheaper than bought commercial soap, but it is so much nice to use and i agree that it is funner. if cost is an issue, don't use colour or fragrance as they can really add to the cost of the soap. i really recommend that you do the soaping once you hve the little ones settled in bed at night. have your oils measured in a pot to melt and have your lye mixed, cooled and safely set away. line your moulds if you need to as well. once the children are settled, you can make the soap. making the soap at night is also good if you are impatient - it give the soap time to set when you are asleep! good luck.