Youngsters in Padiham turned from green to purple for a day to do their bit to help wipe out a disease that has affected millions of children.
Staff and students at Padiham Green Primary School held a non uniform and "wear something purple" day in honour of a campaign to eradicate polio.
Purple4Polio is a project spearheaded by Rotary clubs across the world and in the past 30 years the organisation has delivered vaccinations to 2.5 billion children and the amount of polio-endemic countries has dropped from 125 to just three.
After a talk on the subject by members of Padiham Rotary Club, pupils at Padiham Green decided they wanted to do something to help.
Headgirl Lola Marsden came up with the idea of wearing purple and holding a cake sale for the day and the children also planted purple crocus bulbs given to them by Padiham Rotary Club.
The colour purple is significant as it represents the purple dye used to mark the finger of a child to indicate they have received their life saving oral polio vaccine.