What is an example of Vygotsky's zone of proximal development?

An example would be reading a book with a child. They are reading the Words of the book outloud to you as you follow along. They come across a Word that in unfamiliar to them and ask for help. Instead of directly telling them the Word, show them pictures of ask them questions about what they just read. They will figure the Word out on their own and come to understand what the Word means on their own. They will later learn to do it themselves first before asking for help.