And now a description of the pictures:
1. a beach picture of 13.7.1994 (with Marie Astrid, Grand Duke Jean, Maria Teresa and Henri and the boy must be Louis, the son of Henri and Maria Teresa)
2. I love this picture of 13.7.1994: Marie Astrid, Henri and Maria Teresa seems so relaxed:o
The other pictures are all from 9.8.1994:
3. on the beach
4.and 5. in the water
6. Princess Marie Astrid with flippers :p
7. Princess Marie Astrid and Grand Duchess Josephine Charlotte in the water, but what is Grand Duke Jean doing? Sleeping

?
8. another picture of the family in the Mediterranean Sea
Note: a) It must be the same vacation (13.7.1994 /9.8.1994), but I'm not sure
b) I was on the Côte d'Azur two years ago and I must admit that the water most colder than I thought. Do you know that the Mediterranean Sea has a temperature in a certain deep of 14 degrees and this temperature is constant to the floor. So if there is an unfavourable current the water can become quite cold on the surface too.