difficult child 2 has the less accurate aim
Something you can do for the bad aim - I've seen photos of public toilets that had a fly PRINTED on the porcelain, the blokes would idly aim to flush the fly down with the stream.
But there has been a product on the market here in Australia designed to toilet-train young boys. Part of the kit is something like a ping pong ball but in this case, it's wired for sound, if there are enough electrolytes near the ball (as you get when there is a sudden flow of urine nearby) it lights up with sound as well.
But you can do something simple - just get a red marker and colour in a ping pong ball with little targets all over it and teach the boys to try and flush it with their stream. When the toilet is flushed, the ball should not flush away as well.
At this time of the year in Australia we often get plagues of Bogong Moths. These are large for moths, dusty and brown with a brown geometric pattern on their wings. They migrate north for winter then back south to Mt Bogong in the Victorian Alps, to spend the summer months deep in their cool caves. Bogong Moths are prized bush tucker (although I'm not keen to try them). But they are so dusty! Sudney usually misses the plague, Canberra usually cops it. Australia's Parliament House is a large, well-lit earth-covered builsing right on the migration route for the moths, they have to dim the lights in migration season and even then, you get drifts of dead moths everywhere. Sprays dono't l=kill them because they are so dusty with wing scales that they are unwettable.
A lot of Aussie toilets have louvred windows and the moths get in at plague time. If the seat is left up on the toilet, the moths go in there (another reason we learned to leave the lid down!). it is very off-putting to sit on the toilet and startle the moths, because you then feel them fluttering against your bare behind!
But for the blokes - a bogong moth in the toilet bowl is a big challenge. Thes things are unflushable, I've gone to the loo and seen the toilet bowl full of moths; dropped the lid, flushed with an evil grin, lifted the lid and seen them take off from the surface of the water, completely dry.
If you want to try the "fly on the wall" (or toilet bowl) approach, get a fine brush and some black glass paint, and paint the fly just above the water line in the toilet bowl. Make sure the surface is dry, then leave it for another half hour or more to dry completely.
Once the toilet training is complete (say, when they get married and leave home) you can scrape the fly off.
Marg