Dirt Busters

When Gilly McMahon sets out to build a billy-cart to enter
a local racing derby she decides to do it without the help of
her big brother, Cracker, and his friends, Trann and Bone.
And keep the $1000 prize money.
She is busy hunting for wood from a deserted shack
in the dark of night to build her billy-cart when she
overhears a conversation that makes her realize she needs
her brother's help after all.