Again, are these guys like the stooges? Eat the bananna peel throw away the bananna.
If thats true 'kids are always wanting to help him' (sound a bit like stretched truth)
NEVER EVER ALLOW KIDS TO HELP. Lawsuit waiting to happen. Communication with the client to stay the hell away from the work area and equipment.
Do you allow your kids to help the electrician plumber roofer cable guy home repair guy?
Unless i'm working for Ray Charles, its pretty obvious to use caution and stay away from the working area and path.
Black hose is fine. And so are caution warning signs.