We (me, dn - 11, dd1 - 11, dd2 - 8) are catching the train to Limoges on Wednesday, but due to Eurostar going on sale long before SNCF timetables are announced we have ended up with an extra hour in Paris - we arrive at Gare du Nord at 13:56, but don't depart Gare d'Austerlitz until 16:41.
Obviously we need to travel between stations, but that won't take 2h 45mins. Any suggestions for something to do near Gare d'Austerlitz on a Wednesday afternoon? Perhaps a park to play in? We will have our luggage with us, but it is rucksacks so easily transportable. TIA