I had this idea you could buy spray stuff to temporarily mark out beds before digging them up. I was told there was no such thing at my garden centre, and directed to normal spray paint. I was told that I'd dig the lines into the bed anyway so it didn't matter if it was permanent. At this time when both DCs were being a nightmare this seemed to make sense. But when I got home I realised this meant I would not be able to play around drawing and experimenting shapes. I have googled, and come across games paint. But if this is anything like markings for a football pitch it is also too permanent to me.
So is there such a thing. Or what should I do instead?