My son (10) was just sat on sofa and about for me to come and he’s covered in some sort of yellowish foamy/sandy substance. Pic attached. Cannot figure out what this can be?!
for context, son been there for past hour, just reading. The substance is all in his hair and covering his body and clothing from head to foot. When he stood up there was a mark/outline where he’d been sat as though the substance fell on his or originated on him. He’s showered and washed his hair. I’ve throughly hoovered sofa- the substance was difficult to Hoover out in one go, took a few goes over to get it all up. There nothing on the ceiling above where he was at- it’s all smooth, clean and white. Google reverse image search and general google is unhelpful. Anyone seen this before and any clue?