Can I just amen the calf raises? Those are the best ever for strengthening and toning your calves and they're even better for stretching your tendons if you've got that kind of problem (Hi!) The lying on your back, lifting your legs and keeping your knees straight? You can also pull them in until your knees are kinda parallel to your body and then slowly extend them, never letting them touch the ground. Fantastic for core.

If you pick up a yoga pad or something similar (even a blanket to fold up), you can probably do some triceps and biceps curls with the little barbells.