Oh I forgot. One of the very best musical activities we ever enjoyed with our kids--absolutely free--was mimicry. We would go outside, and imitate the bird songs we heard, anyway we could make the sound. We whistled, croaked, cooed...it was a blast, and my daughter has about the best cardinal song I've heard on anybody but a cardinal! Mimicry is also great training for learning other languages. Children learn languages with tremendous ease around this age Beccy, so if I were you, I'd put a little more effort into teaching activities that support them learning a second language, and use songs as the music to support the language. Also, learning about the instruments in cultures who speak that language, etc. It is a great wholistic way of teaching for that age especially.