Magnolia Mudd and the super jumptastic launcher deluxe

"Magnolia Mudd ... [is] an inventive girl who'd rather tighten a nut and a bolt than tie a ribbon or bow. For Magnolia Mudd, her Uncle Jamie is the very best grown-up. He always invents cool things with her ... until the day he and Miss Emily announce their engagement. That's bad enough--but even worse, Miss Emily wants Magnolia to be a flower girl! No way is Magnolia tossing petals. But it turns out that Uncle Jamie's new bride-to-be may be more fun that Magnolia ever imagined"--Provided by publisher.