Secret Aeroplane Park in Ferney

This park is uniquely located right up against Geneva Airport's runway. From the climbing frame you can view private jets and huge boeings roar in right next to you. The park is a nature reserve and there are often plane spotters sitting on the many benches overlooking the runway.
I particularly like the merry-go-round and its ability to make you feel quite sick while you attempt to demonstrate conservation of angular momentum.
To find these swings park by Lidl supermarket and head through the gate in the fence past the large ponds.

Adjacent to Carouge's Museum

Just by the museum in Carouge is small but perfectly formed park. It's a short walk from the excellent Saturday market place here. Go through the gap in the stone wall to find the park.

Indoor Play In Carouge - Wolfisberg

Wolfisberg is a laid back and sophisticated bakery and cafe, it's good for coffee, lunch or a drink. Children are well catered for with a climbing frame sensibly separated from the diners by a sheet of perspex - fabulous!