The sisters did nothing wrong but ended up selling some small toys containing sand which has now been declared a health risk.
Quinn, 9, and Frankie, 5, decided over the last school holidays they would get into the retail business.
They set up a stall outside their St Kilda house and made some hand squeezies to sell.
Dad Kieran Cropper said it was a chance to get some experience for his daughters to sell some items and run a street store.
‘‘Just something to do in the holidays and having a bit of fun,’’ he said.
The family got some balloons and threw in some kinetic sand to make the toys.
The items were slightly smaller than a tennis ball and went on sale. It was a breezy afternoon, the girls sold about 10 and the retail experience was over for the day.
But more than a month later, the family was having tea on Monday night and Mr Cropper realised what was in the items.
‘‘I thought, hang on, what did we put in those balloons? It was that sand wasn’t it?’’
He was right and quickly advised on social media platforms that those who still had them to do the decent thing and get rid of them in the correct way.
Mr Cropper said they innocently got caught out and his daughters had done nothing wrong.
