There are so many easy readers out on the market today. One nice thing with them is they are written on varied levels. You can find book simple enough for a beginning reader and ones that have longer paragraphs and even chapters. The other really good thing is they cover a wide range of topics. This is a great way to introduce your child to non-fiction books.
One thing that I did as a kindergarten teacher was to send home these leveled readers to my students who were reading. I would send home an easy reader and book report in a gallon size zip lock bag and have them return them a week later.
On Teachers Pay Teachers, I have posted 7 sample book reports for you to buy. I also enclosed a sample parent letter. This is one of those reports. You can get 2 if you download my free sample then the other 5 if you buy the kit for $2.00.