This is for Phonics centers with small groups:
For high level thinking: Make books shaped as an object that starts with a particular letter that you are studying. Have the children to fill each page of the book with words and pictures of things that begin with that letter. Some may not be ready to write on their own so at the beginning of the lesson make a class word/picture list of things beginning with that letter. The children can copy or come up with new ones on their own.