All the reviews I read for taking a baby to Paris mentioned the playground in the Jardin du Luxembourg. It’s true, it’s great. You have to pay a few euro to get in, but there’s lots of equipment. The slides were a bit old for Conor in that he couldn’t climb up to them (ladders and ropes), but he had a helping hand from me. He loves rocking horses still and enjoyed the sandbox.
There was a funky roundabout too.