Preschool Spanish

I would like my kids to be bilingual, and I have looked into some different programs/activities to use with them. I borrowed the Muzzy program from the library. The sound fidelity was poor which may be because it had been used a lot. Overall, it was just weird with strange characters and primitive looking animation. Again, this was an old copy so perhaps the sound quality and animation may be different in a newly purchased copy. My kids watched it, but I don't think they picked up any Spanish skills from it for the short time we had it. Another option is Little Lingoes which is a local learning center that teaches Spanish and Mandarin Chinese to different age groups. I would like to take my 3 and a half year old, but I haven't been able to find a time that fits into my work schedule. One of the local YMCAs also have a class for preschooler, but it is on a day that I work. So, alas, for the time being, I will try flash cards with both Spanish and English words on them. It will help me too.