The parents of twin girls from Warrington say they need to find a cure for their rare genetic condition.
Two year olds Darcie and Evie Chapman can't go out to play because the excitement could literally kill them.
They have a type of severe epilepsy called Dravet Syndrome which causes severe seizures if not controlled.
The condition also causes developmental delays and behavioral problems.
Their seizures are now successfully controlled using medication.
For more information on Dravet Syndrome click here.