I hope you all have a wonderful break! When you can, please try to make use of some of your time for practicing :-) It would be a shame to come back all rusty.
Speaking of rust, now would be a good time to consider getting some new strings for your guitar. Over time, normal wear and tear will cause your metal strings to oxidize as well as lose their stretch and tone. There are a number of brands and styles of strings available, and my best suggestion is to take your guitar into a music store and ask their advice. Most stores will even put them on for you for a fee (I think Guitar Center re-strings for about $11.00). For kids, I prefer "light" or "extra-light" strings (I just put some extra-lights on my wife's guitar and she loves them).
Additionally, now might be a good time to consider investing in a good tuner for your child's guitar. There are many available at a wide variety of price points. I just got this one, the Snark Tuner, very inexpensively from Amazon. Your child will be learning to tune by ear during the second semester, but a digital tuner is a fantastic investment.
Please continue to practice your Christmas carols (if you lost yours, check out the post below). Also, continue working in your books; try to get ahead. If you need more materials or more ideas, feel free to email me or comment below.
Thanks a bunch! Have a Happy Christmas and a great break!