These locks are great. I teach T-K and my students have mastered the letters and letter sounds. Many of them can read CVC words. This particular set of locks/keys is both challenging and fun for my students!

My students loved this and could not wait to be in my group to use it with me. We did it together first so they won't be opening all the locks for no reason, and then I let them use it independently. I also bought the CVC word locks as well. This keeps my students so engaged and interested - they start to make up other games with these, like all the long A vowels are living together and then the long O words wake them up in the house...I would definitely recommend it - other teachers who saw them loved them and wanted to know where I got it from