Simpson from Fulham, west London had hoped to raise just £500 for UNICEF's earthquake appeal by cycling eight kilometers (five miles)around a local park.
"My name is Charlie Simpson. I want to do a sponsored bike ride for Haiti because there was a big earthquake and loads of people have lost their lives," said Simpson on his JustGiving page, a fundraising site which launched his efforts.
Just five miles by a little boy will do so much.
VIDEO OF CHARLIE SIMPSON FROM ABC NEWS