Fernando Mateo, 14, convinced his father, the owner of a Manhattan carpet store, to donate dollars 5,000 ( pounds 3,350) to Toys 'R' Us. Then anyone handing over a firearm to the police would get a dollars 100 gift voucher at the store.
The incentive was more successful than the police's gun-exchange programme.
By midday on Saturday, police had received 299 weapons 'and they're still coming in', a spokesman said of the special exchange that was to end at midnight.
Jose surrendered a semi-automatic handgun. 'I guess I probably still need it,' he said, 'but this thing is so good to just let go by.' His daughter wanted a doll's house, he said, but it was too expensive. 'With this money I'll be able to do it now.'