Toy sellers warn parents not to leave popular toy in 'direct sunlight' (Image: Kennedy News & Media)She immediately washed the sticky substance from his foot under cold water, but an hour later, the skin began to blister. "NeeDoh products are designed and tested to meet applicable toy safety standards. "We have also reinforced safety warnings on NeeDoh product packaging and across our e-commerce listings. "We encourage parents and caregivers to supervise children during play and to review all product instructions and warnings before use. One online toy seller's safety instructions now states "do not leave the product in the car or in direct sunlight".