My son is diving head first into chapter books. The rule in our house like many others is that if you want to see a movie and it's based on a book, you need to read the book first. Chapter books are tricky and take a while so a book mark is a must. A matching book mark is even better.
You will need some sticky back foam, an oversized paper clip and some stickers. We rae reading Harry Potter so we used Harry Potter stickers. Or you could spell a word using foam stickers too.
Start by cutting a pirce of foam and before taking the backing off folding it in half. Press hard to establish a good fold.
Take the backing off and press the paper clip into it.
Fold the other half over and press.
Go read and be merry!