JO

My experience with kubinage is that when done well there is less risk of injury to the head and neck than with most other throws because the head and base of neck it supported by the thrower and it is difficult to head plant. When I was a beginner, there was a yudansha that regularly pulled this one out of the blue on me.

PS - From your videos, your kids seem to be learning good ukemi, That goes a long way to avoiding injury. I wish I could get my kids that interested. All I manage is the occasional short class in the basement. Maybe when they're older.