It is correct to wash down a bit classes for kids. It is a nightmare to discipline them until a team shapes, so what Onna said is correct, have small groups or have an assistant instructor for larger ones (although they tend to have the attention distracted much more easily so a group working on two separate themes can lead to them watching the others and forgetting about what they have to do). The program can contain things which will be useful later if it occurrs they want to become more than trainees for fun.

Mc Dojo in my place has a nasty meaning and I will give an example.

This guy was practitioner of - say - style X, a pretty reputed contact Karate style. He was nice and humble and did some good (apparently) things to spread the style. Then comes the nightmare. He comes with a diploma for a 3-rd dan degree (all the others had 1 or 2), registers the thing to a sanctioning body, becomes the higher ranked and starts a whole mess. After he almost split the style in two someone seized that the diploma was from year Y whilst the style establisher who allegedly signed that thing in nice Kanji's was dead and burned on the funeral stake into ashes TWO YEARS BEFORE ! No comment, haha !

They spit him out, he doesn't stop. He establishes his own style, goes to schools, opens programs. He went to a very posh school refurbished top to bottom by the local community, where parents of children are pretty well-to-do. Puts fumes into the boards' heads with a lot of blah blah. Takes twice the amount of the regular taxes and stuffs the gym full as the place has 3000 kids. Buys karategi's from a sports shop, sticks his logo, sells them thrice the price. Puts extra taxes for equipment, no one takes notice he didn't register the equipments on the school sports association as it was normal but on his club, so he even gets taxes diminished for having spent money on them. Last but not least he takes 600 E per child to go with them at an alleged "international contest" which is matter of fact a larger sort of interclub in a neighbouring country, where some schools agreed to have a brotherhood in sport and do some semicontact fighting. Top to bottom, evaluation is that he put in his pocket 15000 E in some one year and a half, for working 3X2 hours a week. No comment !