I discovered this fun music website for kids. Some of the material is geared towards "readers" several of the activities even young beginners could try.
The "Radio" has many short clips from Classical Music. Try having your child listen to different samples and ask them to draw a picture of what the music makes them think of. When children can associate music with pictures, stories or emotions they end up being more expressive performers.
The "Performalator" in the Music Lab can reinforce concepts of reading from left to right. It also reinforces the idea for children that notes high on the page are high on the keyboard, low on the page are low on the keyboard. Although it doesn't involve true music reading, kids can have fun "playing" familiar tunes on the keys like Twinkle Twinkle & Row Row Your Boat.