Yes, you can have your meal in your room but I don't recommend. The dining car offers a good distraction, more things to see (esp in summer since it gets dark late). The windows are larger, too for better viewing. Dining takes less than one hour, so I suggest you give it a try. Depending on the age of your youngest, they may also find a friend at the table close by to chat with a bit. You may also be allowed to eat your food in the lounge car ... I'm not positive on this....but I guess you could ask your room steward if they would bring your food to the lounge instead of your room.