I used normal headphones to record my voice to use with another program. The final product was brilliant. My voice was clear and quite pretty sounding
I would imagine that it would also work for this program.
Another solution would be to use an MP3 or MP4 that has recording capabilities. You can record the words, upload onto the PC but then I think that they would need to be converted into supporting audio files. I'll try it out hopefully soon and I'll get back to you on how it went and if it is time consuming. Being a mum, I know that time is very precious and we mums always try to maximise the bit of time we have.