My son’s kindergarten teacher last year was teaching the 4-5 year old boys about personal safety and had a good line. She said, if someone does any of the above things, even if he/she tells you not to tell your parents, you must right away tell your parents and then you don’t have to worry because you won’t have to see that person again.
I thought that was a smart, age appropriate way of encouraging children to tell their parents and not be afraid of the repercussions. My son now knows that if he tells me, I will keep him safe.