That simple but compassionate act by the seven-year-old truly inspired the British public and rather than collecting his target amount of £500, Charlie raised an astonishing £200,000.
Luckily cycling five miles around his local park hadn't tired him out, and Charlie's legs weren't "too achy" by his own account to ride his bike to Downing Street this week to meet the prime minister's wife.
Sarah Brown was on hand to congratulate the youngster, who arrived with his proud family, and give him a tour of the residence.
Unfortunately her husband was unable to attend, since he was in Northern Ireland, but he did send a personal message describing Charlie as "truly inspirational and a shining example of the friendship, goodness, and compassion so often shown by British people."
For Charlie, the visit to Number Ten was also a chance to try out his wheels on a different terrain.
"It was very fun going to the prime minister's house and meeting Sarah Brown," he said.
"I cycled my bike down Downing Street and even a bit inside."
And he revealed he got the chance to speak to Sarah's two sons, John, six, and three-year-old James, about one of his favourite subject – bikes.
One of those who supported Charlie's efforts by pledging money was Simon Cowell.
Calling him "the most astonishing fundraiser in the country", the X Factor judge donated £5,000 to the campaign.
"There aren't many adults who have ever raised so much money," commented the music mogul.
"For a child of his age it is just phenomenal. I think it's great that children like Charlie can stand up and make a difference and quite frankly put the rest of us to shame."