As you've said you're not looking, at this time, to make it a full-time occupation, go for it. As long as you are enjoying it and not losing money, it's a great way to spend your time. If you look at it as a hobby that brings yourself as well as others a good deal of pleasure (and has the potential to make a little income on the side) how can you go wrong.

The only thing I would caution is that you don't let it overwhelm you. Start out very slow, under-promise and over-deliver, both on the time it will take and the quality of the product. If you take on too much you run the risk of raising your own resentment in the venture and disappointment in your customers.