Think this through
( A ) Flying to mainland Europe Currency is Euro ( Switzerland has Swiss Francs But takes Euros )
( B ) Flying to London Currency is £ Sterling ( Will not take Euros in Shops )
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( C ) I would suggest flying from USA into / from Amsterdam ( Schiphol )
Why ?
At the Airport Ground Floor Trains will take you to City Center OR To Paris etc.
... Take train to Amsterdam Central Station .... ( 15 min. trip ) Go to Hotel
Take Canal Boat Tour . Art Galleries ( Boring for Kids )
OR Take a Bus tour to Madurodam near Scheveningen Toy Village ( Not boring for kids & adults )
Or Take a bus or train to " The Efteling " Park . Kids will enjoy this Theme park
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From Schiphol take train to Paris
Do the sights .... Forget
Disneyland Paris ... you have this in USA
Try Park Astrix another Theme park great for all ages .
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Train from Paris to River Cruise
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At the end of cruise Take train Back to Amsterdam
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Flying into London is O.k
BUT you either go back to airport and fly to ?
OR YOU CAN take EUROSTAR train to Paris via the Channel Tunnel