Luxembourg Gardens (Jardin du Luxembourg)
At the Grand Bassin, model sailboats can be rented, while at the pint-sized Théâtre du Luxembourg, visitors are treated to a complete theater experience in miniature: in a hall filled with child-sized seats, marionettes put on shows whose antics can be enjoyed even if you don't understand French. Just north of the theater, kids of up to 35kg (75lbs) can ride Shetland ponies. Less rider-friendly, you can visit the 'ruches' (beehives), established here in 1856. There are also numerous sporting fields and facilities. For higher-brow visitors, the early-20th-century Musée du Luxembourg at 19 Rue de Vaugirard is dedicated to presenting the work of living artists. The Palais du Luxembourg is worth a look.
To get there by train, take RER line B to Luxembourg