@roger,
On the other hand, that could be seen as favoritism.
Guy sounds a tad obsessed, but he's probably all gung ho about the project.
I once was selected, lucky me, the one from our school to enter a big fat competition for a real and somewhat local city square re-design... while I was working 30 to 40 hrs a week on an actual big project (coordinator), and taking bunches of units in land arch school at night, and doing homework in the middle of the night (also married, cooking, blah blah blah. Chihuahua! No kids though, no way I could have done that w/kids.) I took it on as I love that kind of design puzzle, knocked myself out with a couple of hundred hours fit in somehow, and it turned out the teacher who chose me (blah blah) didn't have the right program criteria. (Long time lesson to check stuff out from the city yourself, on foot, in the right department, and request updates.) It wasn't a waste of time, as I did have fun while sleep deprived, but it made me cranky. But I was well into adulthood.
I think Sozlet will be good in science in the future, if that is her thing, with or without this project and she's a kid and likes basketball. I'll be interested how this all turns out.
I might, were I you, talk with the principal. I think. Would that bounce back against her? I should hope not, for an inquiry. It might be hard not to flash how science can run in the family, but I'd avoid that with Mr. Avid. I think.