Next year, I am taking two of my grandchildren to London for about 10 days, and then plan to take the Eurostar to Paris and spend an additional 3 nights there before flying back to the states from CDG. The last (and only) time I was in Paris was 1999, so I have some knowledge of the area, but it's been 25 years; hence the question. We will probably get into the city on the 6th or 7th of May.
My grandson will be 15 when we travel, and my granddaughter will be 11.
A friend of mine who has an apartment in the Marais told me that the 4th and 6th would be decent options, and maybe the 3rd. But he admits that since he lives there (part of the year now that he is retired), he's not as well versed in travel information. I'm looking for an area that is fun and would enhance my "cool Oma" status; relatively close to the Seine, Notre Dame, etc.; although using public transport is fine, too. Generally I like to keep hotel prices fairly low, but since this is a short trip and we will only have 3 nights there, I'd be willing to splurge a bit (although I have a feeling my splurge is someone else's normal hotel budget). :-) At any rate, I would prefer not to spend more than €300 per night if possible.
I was thinking about an apartment, but decided against it. If we were there longer, I might go for it, but with only 3 nights, I'd rather have a hotel and not have to worry about cooking or anything. So basically I need area recs and also hotels, if you know of anything; ones that have family rooms would probably work best. Thanks for any help you can give me!
ETA: Well, the dates have already changed. My granddaughter's school just released the dates for MCA standardized testing, so now I may be looking at the beginning of April.