This is great guided lesson for Kindergartners or an independent activity for 1st and 2nd graders. Have students cut out the letters at the bottom of the page. For Kindergarten, the teacher can call out a word and have all the students build it with their cut out letters. Then they write it on the lines. Have older students working either individually or in pairs to see how many different words they can make by rearranging the letters. You can make it harder by stipulating that the words have to have at least 3 letters or a long vowel word. I've also made it into a competition and the person/pair that found the most won a prize!