This center is common in elementary schools. I have a bag filled with pipe cleaners in a variety of thicknesses, color, and textures. Students use the pipe cleaners to create the letters of the words on their weekly vocabulary or word study list. They can leave the letters apart and spell the words or they can connect them together as a whole word. For a challenge, students can sort the words into categories such as nouns, verbs, and adjectives. Remind students to untwist the letters before putting them back in the bag. For some reason, I have found that this center is calming for students who have behavior issues or who are ADHD. On the other hand, if you have a student who is a perfectionist they sometimes do not like this center.