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Your daughter is entitled, as an EU citizen under 26, to free entrance at Versailles and public museums in Paris. Depending on how many museums you intend to visit, you may want a Museum Card. My family (non-EU) love museums; for us these cards always pay for themselves, especially since the option to go back the next day lets us duck out of museums at hours they are too crowded. (Louvre: I'm thinking of you.) In many places you can also jump the queue, if any, with the Pass.
I don't know about EuroDisney, which had zero attraction to my sons. You might see if your daughter would rather skip. You can access the ticket prices here.