Our local LL got the older players to ump the younger games. They had the option of taking what amounted to a full day of class followed by a test. If they passed the test (NOT easy), they made an extra $5 or $10 per game...can't remember which...
Both my boys started umping at coach pitch level and, while my younger one didn't enjoy it too much, my older one ended up doing Majors games at 13 and a few 9U to 11U travel games. At the higher levels, he did it with an adult behind the plate, but he was quite good at it...maybe a future profession when he hangs up his spikes...
Have to say though that he had plenty of respect for the umps PRIOR to being one...he had 3 different coaches who also umped above LL level and they made sure their players had some respect for Blue! Not that I'd allow anything different either though...
I had to fill in a few times when the other ump didn't show and I certainly agree that it is not as easy as it looks...that said, I don't always agree with my wife, so you can bet I don't always agree with the ump either...good news for them is they aren't paid to be sure I agree!