The favorite childhood memory of many Parisians, the Jardin d'Acclimation is a kid-size amusement park both children and parents can enjoy. The list of activities includes camel and pony rides, old-fashioned amusement park rides, rope-climbing, zoo, playgrounds, mini-farm, rental bicycles. Rides require tickets, but many activities are free. Nearby is Fondation Louis Vuitton, which has children's activities on the weekends.
Closest metro is Les Sablons on the #1 line.
Jardin d'Acclimatation, Paris, France