I had the most fun of my life racing jr's, great people, most tracks are great with them. I had all 3 of my daughters racing them at the same time eventually. We had cars by Spitzer, Hardens, RPC, and Halfscale. I would advise to buy the absolute best car you can afford, shop for a deal, and if she loses interest you can usually get your money back if you bought a good car/parts to start with. Stay away from older "off-brand" cars as they will be a tough sell. Halfscale, Motivational are the most popular, RPC are great cars in my opinion, as are Hardens also. jrdrags.com and jrdragsterplus.com , as well as racingjunk are great places to look.