Groundskeeper Osvaldo strode out towards the Quidditch pitch with his face set in grim determination. He was not particularly happy and would be happily grumbling to himself if he were the sort of man to do such a thing. He was more disciplined than that. If the staff of the school insisted on having this charity fair on school grounds, then it was unfortunately his job to make sure the children didn't make a complete disaster of his domain.
He had already been 'petitioned' by one of the children, one of the very young children, to approve her charity for the event. It had been some sort of tutoring group from Mexico. He had naturally been hesitant to sign his name to anything, but in the end he had come to the realization that he was going to get roped into sponsoring one of these things regardless of of his desire to remain aloof. Fortunately he only had to give his approval, not actually do anything else in regards to it. The Mexican educational reasons were good enough for him.
Now he was on to the next phase of his duties for this eventual debacle. Since the Quidditch pitch was the most likely place for this fair to occur, he was starting here. He looked around, committing the scene to memory. Once complete, he called out in a terse voice, "Wezzel!" The prairie elf appeared next to him.
"Yes Master?" the prairie elf asked uncertainly. The Master did not sound entirely happy.
Osvaldo gestured around the pitch. "Collect small sod samples from around the pitch here. I will need one from each intersection of a 10' grid pattern. Make it no bigger than 1 inch square and including both ground and plant samples." He waved his wand and a board appeared on the ground with a scale drawing of the layout of the pitch carved into it. A grid pattern was indicated and a small 1" hole was made at each intersection. At the bottom of each hole was a gooey green substance. "Place each sample into it's corresponding hole on this board." He gave the elf a stern look, "Do not mix them up. Once that is done. I will have your next task ready."
Leaving the prairie elf behind to see to its task, Osvaldo began to pace the perimeter of the field waving his wand and muttering incantations as he went. Weezel looked at the board and scratched his head. This new master was strange.