The family of Race Across the World contestant, Sam Gardiner, are raising money in his memory for the National Fetal Alcohol Spectrum Disorder.
Caused by exposure to alcohol in the womb, FASD affects around two to four percent of children in the UK, and far higher among children in care or who've been adopted - like Sam was.
Described as a hidden disability - what's your experience?
Nicky Campbell asks: FASD and you?