What you can do in this case is have the backings available in MIDI file format, and play them with a MIDI File Player. Although Windows Media Player will play back MIDI files, it won't let you slow them down or speed them up.
With this program you'll be able to adjust the tempo of each track to suit your needs and taste. If the tempo is too fast, you can slow it down, and vice versa. You'll even be able to mute tracks on the backing to hear one part of the backing more clearly. This is a fantastic tool to have in your music equipment collection. It will open any MIDI file you find on the Web, including MIDI files of your favorite songs.
Value $19.95 - yours free with this ebook.

Sheet Music for Recorder
This delightful collection contains fifteen of the most popular nursery rhymes and children's songs of all time.
Beautifully illustrated by Matt Bridges, the collection is as good to look at as it is to play.
The notation features note names written inside the note-heads, making them easy to read.
These are the songs:
Five in the Bed 
Mr Eddy Had a Teddy  
If You’re Happy and You Know it 
Diddle Diddle Dumpling 
Li’l Liza Jane
Three Blind Mice 
Five Little Ducks
Baa Baa Black Sheep 
Hickory, Dickory Dock
A Frog Went Walking 
The Animals Went in Two by Two
Hey Diddle Diddle 
Humpty Dumpty 
She’ll be Coming Round the Mountain
Each song has chord symbols for guitar, keyboard or piano, so another player can strum along, or play an accompaniment.
Special Bonus #1
You'll Learn Faster if You Know How it Should Sound
Special Bonus #2
What if I Want the Backings Faster or Slower?

Everyone I've taught and spoken to about learning music says that it's easier to play songs that they've heard before and already know.

To help you learn and play these songs as fast as possible, this free package includes MP3 recordings of the songs.

On each MP3 track, a backing band plays the piece twice - once with a recorder to demonstrate the tune, then a 2nd time without the recorder for you to play along with.
The backing tracks give your performance rhythm and harmony. You'll love the color and depth they add to your playing. You'll sound fantastic.
You can use the backing tracks as an accompaniment when you wish to play for your family and friends, or even perform at a concert.
Tempos are slow (60 - 80 beats per minute), but lively so you'll find it both easy to keep up and tap your foot.
Value $9.95 - yours free with this ebook.
Free Recorder Sheet Music
Learn to Play Recorder, Book 2
What  Ebay customers think of my publications.
Learn to Play Recorder
Three songs for Recorder
Ebook & Audio - Instant Download
Pay Here