go shopping for fireworks you ll need to bring your smartphone. at blackhead fireworks in joplin they have little bar codes on the products that you scan with your phone and get a preview of what it looks like. larry shelley is the manager. he says the customers really enjoy it. i know that the last couple of days we ve had over 1,000 hits on those items. so i think it will continue to grow. reporter: emily cla and her dad are e opping for fireworks. they say they love the new previews. yeah, because some fireworks that you spend a lot of money on they turn out to be pretty lame. reporter: and they say it s nice to see the fireworks before you commit. the good thing is you don t have to buy it, is because you can look at it before you even light it. some of these items, especially these 500 gram ones are bigger items. they want to make sure it s what they re looking for. reporter: craig wooten discovered the qr codes. he says in the past he relied on