The Arts & Crafts Museum, dating to 1794 and Europe's oldest science and technology museum, is a must for anyone with kids – or an interest in how things tick or work. Housed inside the sublime 18th-century priory of St-Martin des Champs, some 3000 instruments, machines and working models from the 18th to 20th centuries are displayed across three floors. In the attached church of St-Martin des Champs is Foucault’s original pendulum, introduced to the world at the Universal Exhibition in Paris 1855.
Louis Blériot’s monoplane from 1909 is also here.
Guided tours are in French only but the excellent English audioguide (€5) more than compensates.