Two teenagers have been convicted of starting a fire in Uckfield, East Sussex which caused more than £1million of damage to charity shops.
Sense and the British Heart Foundation lost their entire stock in the fire in September 2012.
More than forty firefighters were needed to bring the fire under control.
18-year-old Adam Bushell pleaded guilty to arson and was sentenced to nine months in prison suspended for two years.
Geriant Purton was jailed for 12 months for the arson, and was also sentenced to two years for a string of burglaries across East Sussex.
Detective Constable Sean Stapley, of East Sussex CID, said: "This incident caused a considerable amount of damage and has had a major impact on the residents and businesses of Uckfield.
"A moment of ignorance turned a harmless game into a dangerous fire.