The biggest fear for me is that dog training and behaviour is an unregulated industry.
I would want to see what
qualifications you have before letting my children anywhere near any dog that is not my own.
I never let my children interact with dogs I don't know well because people frequently cannot recognise the more subtle signs of discomfort.
For example, when my dog is upset her tail will go up, judging from the looks I get when I swiftly recall her I am confident that pretty much everyone assumes tail up = she's excited and ready to mingle when it's actually the complete opposite.
Some dogs the signs of discomfort can be as subtle as a slight stiffening or a stillness.
I have seen video evidence of some terrifying dog interactions from the dog walking company I used to use, clearly they don't see what I see because else they wouldn't be putting the footage online.
So I would definately would want to see qualifications to prove you know what you are talking about.
Assuming you are suitably qualified and the dog is genuinely bombproof and genuinely comfortable around children I think it is a good idea.