Madam SpikyPaws has obviously mistaken ds1's nice rattly Lego in its nice big plastic tub for her litter tray (also a big plastic tub with rattly litter in).
So in my garden, I now have a big tub of catsh*t covered tiny pieces of Lego.
So when you have finished convulsing with either laughter or disgust, some ideas on how to clean and salvage it (if indeed that is even possible) would be welcome.