
Among free museums for those under 18, parks open without interruption, and spectacular mechanical machines, Nantes boasts a density of family activities rarely matched in French metropolises. Comparing these places based on concrete criteria (cost, age group, duration of visit) allows for informed choices without improvisation once on-site.
Comparison of family activities in Nantes: prices, ages, and free access
Families planning a stay in Nantes quickly face a practical question: what budget to anticipate, and for which age groups? The table below summarizes verifiable data on the most frequented places.
| Place | Adult price | Child price | Free access | Recommended age |
|---|---|---|---|---|
| Machines of the Isle (attractions) | About €12 | About €8 (4-12 years), €10 (teen) | Under 4 years | From 3 years |
| Botanical Garden | Free | Free | All | All ages |
| Dukes of Brittany Castle (museum) | Paid | Free | Under 18 years, first Sunday of the month (Sept. to June) | From 5 years |
| Jules Verne Museum | Paid | Free | Under 18 years, first Sunday of the month (Sept. to June) | From 6 years |
| Planetarium | Paid | Paid | – | From 4-5 years |
What stands out immediately: Nantes museums are free for those under 18, an advantage that many visitors discover on-site. The 2 or 3 attraction packages at the Machines of the Isle also reduce costs when planning to spend several hours there.
Themed outing ideas categorized by theme and age are regularly updated on lesptitsbonheursanantes.com, making it easier to sort before a weekend or vacation.

Machines of the Isle and Botanical Garden: two opposing visiting approaches
The Machines of the Isle attract the majority of visiting families. The Grand Elephant, the Marine Worlds Carousel, and the Gallery make up the trio of paid attractions. However, one detail changes the game for tight budgets: the Grand Elephant can be viewed for free from the esplanade of the Parc des Chantiers. Riding it requires a ticket, but watching it in motion costs nothing.
The duration of the visit varies depending on the approach. A quick visit for a single attraction takes less than an hour. Experiencing all three with the queues during the summer can easily occupy half a day.
The Botanical Garden as a free alternative
In contrast, the Botanical Garden requires no budget and caters to all ages. Open every day, it extends its hours in summer (until 8 PM, or later depending on the metropolitan schedule). The play installations designed by Claude Ponti continuously attract Nantes families.
The difference between these two places illustrates a recurring choice in Nantes: alternating paid and free outings to manage a budget over several days. A morning visit to the Botanical Garden followed by an afternoon at the Machines is a sequence tested by many families.
Free museums for children in Nantes: Dukes’ Castle and Jules Verne Museum
The Dukes of Brittany Castle operates on two levels. The ramparts and courtyard are freely accessible, which is already enough to occupy the youngest visitors. The history museum inside applies free entry for those under 18 and opens its doors to everyone on the first Sunday of the month, from September to June.
For children aged 6 and up, the Jules Verne Museum offers a different perspective. Located overlooking the Loire, it provides a journey centered on the world of the Nantes writer. The same pricing policy applies: free for minors, free on the first Sunday of the month outside of summer.
What these free entries mean for a family stay
A two-day weekend in Nantes can include two museums without spending a dime for children. This is a factor to consider from the planning stage, especially for large families where each paid entry adds up.

Treasure hunts and interactive courses: the underestimated family activity in Nantes
The Nantes metropolis offers treasure hunts to explore Nantes parks, a formula that transforms a simple walk into a structured activity. These interactive courses work well with children aged 5 to 12, an age group where just walking quickly loses its appeal.
Several formats coexist:
- Themed courses in urban parks, with puzzles to solve and physical clues to find on-site
- The Green Line, marked on the ground in the city center, which connects the main monuments and acts as a giant treasure hunt for children
- Digital treasure hunts accessible via smartphone, tailored for teenagers who disengage from traditional visits
These activities have a logistical advantage: they require no reservation and can fit between two paid visits without time constraints.
Free transport on weekends: a lever for family outings in Nantes
Nantes public transport is free on weekends (excluding airport shuttles). For families, this eliminates a significant expense when juggling multiple activities in different neighborhoods.
Specifically, connecting the city center to the Machines of the Isle area, then heading to the Dukes’ Castle or the village of Trentemoult by Navibus costs nothing on a Saturday or Sunday. This free access changes how to build a program: activities can be spread out geographically without worrying about travel costs.
- The Navibus Loire connects Trentemoult from the maritime station, a short crossing that children enjoy
- The tram services the Botanical Garden, the Machines of the Isle, and the historic center
- Buses complete the network to peripheral parks like the Beaujoire Park
Planning family outings in Nantes involves combining three variables: free museum access for children, packages at the Machines of the Isle, and free weekend transport. A family of four leveraging these three factors can fill two full days with a budget limited to meals and one or two paid attractions.