Olympic Gold medallist Sally Gunnell and her son Luka

(Photograph) - Olympic Gold medallist Sally Gunnell and her son Luka are urging toddlers across the UK to combine exercise, play and fundraising with the Tumble Tots Walk a Mile and Share a Smile Challenge. The campaign runs until September and aims to raise at least £50,000 for charities the NSPCC and Children 1st in Scotland. The challenge is part of Tumble Tots' 25th anniversary celebrations. Managing director Veronica Pereira said, 'We have designed a special course for children to walk, balance and climb around.' To find out where the nearest challenge is in your area, see the website www.tumbletots.com.