This is an awesome and fun lab. It is a great introduction to pH, indicators, and basic properties of acids and bases. You do need a red cabbage to do this lab; however, since I am giving you a RTF file you can copy the file and modify it to not have the cabbage juice as part of the lab.
It really is an easy process to use the cabbage juice and I highly recommend it. A quick google search will provide you with the simple steps of making the indicator. Best of luck and keep making Chemistry fun for your students!!