Eric;
First, get your friend in here and on the BB, instead of his "lurking", or tell him "We'll hunt him down and drag his sorry behind in here"!! If he's a friend of YOURS, I'm positive he's not only a good fishermen, but also as nuts as a bell house bat and that's OUR KIND of people!!
As to your actual post............. if you've read any of my "Fishing with Sam" posts, where my 6 yr, old granddaughter and I go fly fishing together, you've noticed I've mentioned her "life jacket" here and there.
Since Sam is "smallish" for her age bracket, her dad and I couldn't find a decent "true" life jacket for Sam, by shopping the many box stores and even several sporting goods outlets. Neither of us wanted her wearing "Little Pink Princess", or, "Scooby Doo" on her life vest, because when studying those, they were all for "playing IN and AROUND water" and did not specify actual "flotation times", "position of the child's body, if/when they fell in, etc.".
Some life jackets, even properly strapped on, can flip a small child upside down, when they hit the water, because they're built for comfort so the child will wear them. (they look like man's "dress vest" for lack of a better description).
One day, while out, I had one of my stranger ideas and Sam and I swung by our local Coast Guard station, here, at the beach. They were extremely helpful, in telling me what sort of like jacket was best for Sammy, for why she'd be wearing it, etc.
We ended up getting her a "Stearns Child White Water" vest.(I'll get the actual model/style # and name and post it for you, as soon as I can contact my son and have him give me the info).
It's a bit "bulky", because of it's flotation properties, but not so bad, Sam doesn't mind wearing it. The most important point to her vest, is it immediately-- upon her entering the water, "flips her upright and supports her head and neck out of the water", no matter how she "entered the water" to begin with.
It has "crotch straps", very important, so it doesn't "ride up" on her small frame and/or, she won't "sink down into it" when in the water. The straps go all the way around the jacket, also, so it fits her equally front and back, snug wise.
We also picked one that was short enough also, so Sam can kick her legs, and move her arms freely. (Sam's been able to swim, like a duck, since age 2). If a child's life vest is "too long", even if it has good neck and head support, it can actually put them on their back, or worse yet, on their face. As the Coast Guard Captain told me, "You don't want the child "encased like a hot dog in a bun" when wearing their life jacket!"
He told us, to fit Sam's life jacket, "so it comes to about 2inches above her waist. or, AT her waist, as the very most".
As for fly fishing................... sorry, I can't be of much help, because I didn't start Sammy, (along with her dad, too, another avid fly fisher), until she was just turning 5. When she showed enough interest, though, I built her a rod from the tip of a butt broken rod I had and converted it to an approximate 3wt.It's a fraction under 4' long, with cork and wood reel seat and grip. Because of her strength or agility I guess you could call it, I over balanced the butt end with a Tioga #2.
The reel, makes the rod a little heavy in the handle, but that works great for the way Sam casts. I also made her a custom headed WF3/F line, to help load the super short rod a bit easier.
I'm not too sure, what your friend could do, with a 2 year old, equipment wise, but it's super she's already showing so much interest!
Saint Paul-"The Highly Confused"
You cannot do a kindness too soon, for you never know how soon it will be too late.
-- Ralph Waldo Emerson