My son has been using leapfrog products for a few years now. He is only 10 now but his spelling level is past the 9th grade level now and I believe it is all do to the Leapfrog spelling twist. I have the mind-connector that goes with this product and now I have to make up our own spelling lists and put them on the download/uploadable cart. that you can get to use with this product. What is so great about the turbo twist products is that the kids have fun and learn at the same time. I highly recommend this product.