In addition to having a reading background, I also have a five year old child I am teaching to read. To do this, I am using a specific program that is one-on-one and pretty inexpensive (around $10 online if you search on Google). Please download the attachment to learn more.
Also, please read the reviews provided online by others who have utilized this program. For example, there are some questions about introducing this program when a child has already had some introduction to sounds and letters; in my situation with my son, he had already had some instruction in school and it has not affected his progress and reading using this method.
This is a great summer activity (in my opinion as a parent and reading educator)!