There is a book called Kidfiddle by Jerry Silverman (Mel Bay) that may still be in print. The cassette tape is out of print, unfortunately since it added greatly to learning.

There are 46 Easy Folk Songs any young fiddler will love to play. My favorites that give the student the chance to learn to play in all the basic keys are:

Cripple Creek
Old Joe Clark
Red River Valley
Filimiooriay
Rig A Jig Jig
Flop-Eared Mule
Old Rosin, The Beau
Crossing Over To Ireland
Home on the Range
Black-Eyed Susie
Crawdad
Bowling Green
Cumberland Gap
Fly Around My Blue-Eyed Girl
More Pretty Girls Than One
Ground Hog
My Home's Across The Somky Mountains
Sail Away, Ladies
Sally Ann
Red Apple Juice
Sally Goodin
Sourwood Mountain
The Wabash Cannonball
Salty Dog
Nine Hundred Miles
Arkansas Traveler
The Gal I Left Behind Me
Mountain Dew
The Irish Washerwoman
Garryowen
Turkey In the Straw (ol' Zip Coon)
Ragtime Annie

There are many more...you pick 10, I cannot.

This is a delightful little book any beginning fiddler, old or young, will treasure.