Some ideas for you, the possibilities are endless.
Play a variety of quality music daily. Classical, cultural...
Play correct pitch notes and name them. Play a C on the piano and tell your toddler it's a C etc
Sing
Encourage them to sing nursery rhymes
Dnce and move to music of different tempos, fast, slow...
Use flash cards for music notes on the staff and teach them to read music young.
Use flash cards for musical symbols.
Overall the best thing you can do is expose your child to quality music. This will develop their musical ear to pitch, rhythm, timing, and familiarize them with the music they can learn to play later. You can teach a 2 year old to play piano but it is hard work
Digg
