i build a life-size replica of earth,then i accidentally drop it and it breaks apart. You get the iron man suit!
She's nice enough, but I don't think it's going to work out. You get a date with Vice-Principal Luna.
I drop it in the local drinking water, average IQ drops drastically the present contains... the perfect piece of bread
I extract the DNA to create an unstoppable army of magical Unicorn clones. Your gift contains a mint condition autographed copy of your favorite book. It's a first edition.
I lock it away for safe keeping and read an old copy of the book. You get an almost functional flamethrower.