An 11-year-old London boy has raised thousands of pounds for children affected by the Philippines typhoon.
Charlie Simpson from Fulham was so upset by news of last month's disaster that he decided to organise a 40km (25-mile) sponsored bike ride.
He even had some expert advice on the eve of his challenge, with Olympian Sir Chris Hoy taking part in a training ride with Charlie.
It took Charlie just under four hours to complete the challenge in Fulham's South Park, accompanied by his dad Dan Simpson and 12-year-old friend Sophia Ground.
The schoolboy has so far raised more than £4,000 for Unicef's Philippines children's emergency appeal, which will help them provide emergency food, water and medicines to those in need.
Cycle fans may have to pay up to £30 for their first chance to try out the track where Sir Chris Hoy, Dame Sarah Storey and Laura Trott won gold at the London 2012 Games.
The 6,000-seat London 2012 velodrome and BMX track at the Queen Elizabeth Olympic Park in Stratford reopens on March 4 2014.
A coached accreditation session will be needed to ensure riders have the skills and confidence to tackle the swooping Siberian pine velodrome track and the BMX courses, said the Lee Valley Regional Park Authority, which owns and runs the venue.
The hour-long taster session on the 250m track for unaccredited riders costs £30. The price is £22 for people with a concession, which includes the under-18s.