;)
Tons of interesting hobbyist projects in the booths. Check out the polyhedron made with pencils, paper, and rubber bands on the table.
A translation of the festival website is here.
Arc de Triomphe | The Sunday Bird Market | Context Tour "The Belly of Paris" | The Eiffel Tower | Houseboats on the Seine | Jeux Mathematiques (Mathematical Puzzles) Fair | Luxembourg Gardens | Miscellaneous | Montparnasse Tower | Paris Velo Rent-a-bikes | Shops and Storefronts | Toyota Showroom on Champs-Elysées