First off, there's a LOT of videos on Youtube that involve people getting kicked out of Walmart, so I suggest you watch them to get ideas (some are quite vulgar, but whatevs ^^)

Anyways...

Get all of the fidget spinners (surprised that no one has mentioned those on here yet ^^), take 2 and spin both of them as fast as they can, then they'll turn into helicopters and you'll fly around the whole store, and as you do that, take the others and drop them into glass, toys (specifically the big rubber balls), and most importantly in other people's faces! That'll cause a HUGE mess and possibly an explosion ^_^