Vacation in Paris in end of June

The weekly pass for Paris transport is only available for a Monday to Sunday calendar week, not any seven consecutive days, so whether it is worthwhile depends on what day you arrive. If you arrive later in the week it will be cheaper to buy "carnet" packs of ten single-journey tickets instead of using passes.

There are a few free Paris attractions like the Carnavalet Museum (mostly closed for reconstruction at present), the City Museum of Modern Art (not to be confused with the more famous national one at the Pompidou Centre) and the much under-rated older part of the city art collection at the Petit Palais. But most charge. Many attractions, however, are covered by the Paris Museum Pass, which gives unlimited access to the sites covered, except for temporary exhibitions, for two, four, or six days and is increasingly better value the more days you buy, if you plan to visit lots of museums and historic sites. It also covers a surprisingly large number of historic sites in the wider region around Paris, if you want to do day trips, and can save you time by avoiding having to buy tickets when you get to the museums. No need to buy a PMP in advance, the best thing to do is to buy it from one of the less popular sites with shorter ticket queues, or from a branch of the FNAC books/music/tech store chain which sells them at face value with no additional charge.

As far as scheduling goes, it's hard to say without knowing what your interests are. All I would say is don't try to do more than one "big" museum per day, especially with two kids under 10. Another advantage of the PMP is that you can pop in and out of the bigger museums instead of thinking you have to see as much as possible in one visit. Also be aware that many museums and historic sites are closed on Mondays.

Since you seem not to have a Paris guide book, here are two websites that will help you a lot:

tomsguidetoparis.com

parisbytrain.com

If your 5 days do not fall within M-S of one week and you get carnet of ordinary ticket, note that your kids get half price ticket i.e. 10 metro/bus tickets are 14.50 but for kids 4-9 they are 7.25. The kids are free entry to the museums covered on the museum pass and just walk in with you.

Some questions ...
1) What days of the week do your 5 days fall?
2) What are your interests re museum visits?
3) Are you planning any day trips outside the city?
4) Where is your accommodation located?

The Carnavalet museum has been closed since October 2016 and will remain completely closed until renovations are completed, sometime in 2019.

Because only you know what you like, I think you should get a guidebook or three and start with a list of the 10 things you most want to see and do in Paris.

it is a minor investment for a good trip.

Folks here are great at answering questions, but your preferences are important too.

Hi - Here's a link for some ideas, below. If you wanted to pick just one museum, I would pick the D'Orsay. I think that the space (and the art, of course) is so amazing that it would appeal more to kids than the Louvre.

Def go to Luxembourg Gardens. Lots of space to run and play, boats to sail, ponies to look at.

My husband and son (who was about 10 at the time) went to Les Invalides and really enjoyed the cars, the miniatures, etc.

https://www.timeout.com/paris/en/things-to-do/Paris-for-kids

Have fun! Relax!

shawn