Billionaire businessman Donald Trump Donald John TrumpREAD: Cohen testimony alleges Trump knew Stone talked with WikiLeaks about DNC emails Trump urges North Korea to denuclearize ahead of summit Venezuela's Maduro says he fears 'bad' people around Trump MORE offered kids helicopter rides in a show of wealth as he bragged Saturday that he is willing to spend $1 billion on his presidential campaign.

"I'm turning down so much money," Trump said at a press conference kicking off his weekend trip to Iowa to visit the State Fair, with his black helicopter emblazoned with "Trump" and children standing in the background.

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Trump touted turning down a $5 million donation offer this week before saying he would spend $1 billion on his 2016 bid "if I had to."

"Nobody else would do the job that I will do," Trump said, mentioning jobs, the military, care for veterans and the "catastrophe" of ObamaCare, which he said he would get rid of.

Trump whirled into the Iowa State Fair this weekend on his private helicopter, descending on a scene scouted out by many other presidential hopefuls from both parties.

Trump flew to Iowa on Saturday morning on his 757 after a rally in New Hampshire the previous night, before taking his helicopter from the airport toward the fair.