Blue Sparkles: Book 2 in the Magic Sparkles series in Bloomington, MN

Seeing their mother as a little girl was more than Noah (8) and Megan (11) expected when they discovered a magic tunnel. But when their non-verbal, stroller-bound sister, Elise appears in a vision of the future, the magic really has their attention.
Hoping to reel in its power to help 4-1/2 year old Elise, who has Cerebral Palsy, Noah sets out on a mission to discover how the magic works. With some surprise assistance, he goes into full-on detective mode. Can a tornado of insects, virtuoso piano-playing, a high-speed go-kart race, and swimming with dolphins help him understand--or will they just create confusion? If he can't figure it out in time, will the stem cell transplant alone be enough to make a difference?