Lilly could create a meal for over the summer with easy healthy meals, and share this with her parents/guardians to ensure that she gets proper meals.
I would tell her it is not to late to improve muscle heath. Although I would advise her make sure her joints are in good shape to perform this. If she has previously been working out there should be no problem. If she has not been physically active in a while I would advise her to get her joint strength strong before she starts weights. After this I would advise her to start with light weights and body weight exercises such as a simple push up.
i hope this helps!
