Yeah, I was probably going to wait until 18 for the whistle. It's not as loud as a pea whistle, but it's still annoying. The only reason I would ever give it to them earlier would be because we're in an area that is under threat of a Cascadia Subduction Zone Earthquake. But if they're just going to get it taken away because they can't control themselves, it's not going to be much use. For this particular whistle it is hard to produce a nice satisfying screech, though I suppose they might just take that as a challenge.
For the flashlight, I was thinking more like 15 or 16. The only risk there is losing it, but it's cheap so that's kind of their call on whether they value it enough to replace it.