The weather in May can be unpredictable so bring layers and umbrellas.
Avoid the crowds by doing this on a weekday rather than weekend.
Probably too chilly for most to enjoy the playground during the winter months.
You can bring your own packed lunch and eat in the museum's Group Room. Or you can purchase food at their Brasserie or Café, both of which have children-friendly options available. There is also a third place to eat, the Tower Restaurant, that offers a more fine dining experience. But we recommend holding out for lunch at the crepe stand!