It doesn't take much to amuse primary age children! Make a game out of learning, and the kids are all in. Give them a highlighter, and they think they are on top of the world.
Lightning Words is a game that my students absolutely love. I use this game for both sight words and new vocabulary words that we are learning in shared reading. To play this game, each student gets a "gameboard" and a highlighter (after, of course, a very serious discussion about using the highlighter as a tool, not a toy). ;-) The teacher then either says the sight word, says a sentence using the word, or, if you are doing vocabulary, says the definition of the word. The students have to try to search for the word that the teacher reads. If they find the word, they get to highlight the word. If they find the word in 3 seconds or less (I usually just count aloud slowly), they get to color in the lightning bolt in addition to highlighting the word. I also have a big discussion about honesty and how it doesn't matter if you don't get to color the bolt in yet, because that means you get to practice it some more. I also make a huge deal out of students who are honest, and then they all want to proudly tell me that they were honest. :-)
Let me know if you have any questions, but this is literally such an easy game, and the kids absolutely love it! Also, feel free to e-mail me if you'd like a Word copy so you can change and modify the words! Click the link below to download the pdf.