Boggle- This is by far the most popular in my room. I got this amazing activity from Create-Teach-Share and my kids go bananas for it. I just change the letters weekly to reflect our spelling pattern focus and they go on a word making frenzy. LOVE it!
Interactive vocabulary bulletin board - image only. I could totally use this, when kids turn in all their HW in a week or finish all their classwork, they would get a letter, and they can save the letters until they make a word