A traveling medicine show promises to cure all, but two kids learn it takes more than faith in the miraculous to fix things that are broken. Thirteen-year-old Jack knows what cured his baby sister when his family thought she might never get well--Dr. Kingsbury's "Miraculous Tonic." Guaranteed to relieve maladies known to man or beast, Dr. Kingsbury's potion can cure everything from pimples to hearing loss to a broken heart,...