Every year, I get my youngest sister a prank gift for Christmas. Ranging from coal, to duct tape wrapping, to a box wrapped in a wrapped box x8, to my magnum opus last year: a box rigged with poppers to go off when it's opened. 

But now, I've burned my best idea and don't know how to top it. And it's her senior year of HS. The last year of "childhood". Any good prank gift ideas?

Man. Dog. Van. Building sizzle.fi, surfing and playing disc golf

I write code and sometimes stories. jakeacasey.com

and inside the box is actually just a map to where the present is, somewhere nearby easily accessible

Don't have time for that to set since I'm in the cold in WI. But went with a similar theme of nested boxes each in increasingly difficult "wrappings"