Yes, Debra Riley, you are right !! Khub Bhalo !! (That means, “very good”)
“Evil eyes are absorbed through that black spot.”
The black mark is khol put on children’s forehead to protect them from the evil eye. This is not a religious traditions but a superstitious one still found in many rural areas of Bangladesh and in Dhaka as well.
You can read more about folk beliefs & practices, here.
I’ve also seen black strings tied around children waist. I think it serves the same purpose of protecting the child from the evil.
This is Abdullah and his mother. They live in my neighborhood. I’d rather not give cash to people on the street, so I usually walk to the nearest store with them and buy some food. She wanted powedered milk for the baby and rice.