We started the day at the airport, getting everything set up for the Young Eagles event. Vic was doing the ground crew stuff, and I was flying. I pre-flighted the plane, brought it over and attended the pilot's briefing. Erika, one of the organisers, suggested she go up with me to see what the gyro was like "for the kids", so we went out and did a quick circuit - she wasn't feeling like doing anything exciting, but at least I got to figure out where I should land to use the Golf taxiway back to the transient area where we were based. After that I took a couple of kids up, but when I was going out for the 4th time, the oil pressure wouldn't come up above ~5PSI. I shut the engine down and called it for the rest of the day. The local wisdom is that it's the pressure sensor, rather than an actual pressure problem, but I wasn't taking any chances and pushed it back to the hangar. The odd thing is that there's too much oil in the tank, making me think that there's a blockage somewhere in one of the lines.
After everything was packed away, we went home and I sulked for the rest of the day.