Fly the Plane in Petit-Saconnex

This plane and climbing frame are in a school in Petit-Saconnex so visit out of school hours. Nearby is probably the oldest restaurant in Geneva, fondue of course. Just past the playground is an impressive vegetable shop also.

The Icosikaioctagon at Bois-de-la-Bâtie

Bois-de-la-Batie is some woodland right in the middle Geneva affectionately known as Batty Woods. The climbing frames are big, there's an Octopus, a wooden train and a paddling pool with fountain frogs. Within the woods there is an extensive animal park with goats, rabbits, wild boar, chamois, peacocks, .... On a practical note, there isn't a cafe at the park that we know of, so if you are planning to stay a while bring a bait box.

Springy Bull-rushes at Parc de Mon Repos

Parc de Mon Repos is the park by the lake on the way to the botanic gardens from Geneva. It looks to be good for summer with water channels and dams. There is also a recently renovated paddling pool.

As well as a strap in swing there are some springy bull-rushes, which actually look a lot better than they really are.

The nearby History of Science Museum is a great place to visit with children.

Bouncy Castles at Palexpo

Palexpo is the Geneva exhibition centre near the airport normally reserved for the likes of the Geneva Motor Show. In the winter months, however, one of the halls is taken over by Espace Junior.

The room is filled to bursting with bouncy castles, I counted at least 20 in total. There are also trampolines, battery go-karts and self propelled vehicles for the younger ones. This year the charge was 12 CHF for each child and adults were free, the go-karts require an extra token. There's a small shop selling ice-creams, coffee and beer. They have tables and benches to allow you to bring your own food or even host a children's birthday party.

Certainly this place has to be visited at least once over the winter season.

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!

The Lizard of the Jardin Botanique

Geneva's Jardin Botanique is quite simply amazing and we seem to never go into town without visiting. It has  bespoke wooden climbing frames with rope bridges, an excellent hoist to lift the sand and a lovely lizard and bugs to balance on.

There's a unique carousel, a cafe for a beer by the playground, peacocks roaming and an animal park on the other side of the green. If you have never been here... go!
Beyond the playground there are touch and feel plant areas, a hot house, ...

A childrens' amphitheatre provides story telling opportunities though I don't know if anyone organises them?

Switzerland while famous for being expensive offers a lot of stuff, like this, for free.

Playing in Geneva Airport

Geneva airport has some of the best facilities for babies and toddlers. As well as a play area there are children's beds and cots.  The room is open from 08:30 I believe but I have heard of it being opened especially over night for people stuck at the airport. It can be quite tricky to find and is flight side just after the security check.

This place is so good it is worthwhile coming to the airport a bit early in order to spend some time there.

Meyrin's Moon Base

It's a little know fact that Meyrin has it's own moon base. This is never a very busy playground in my experience since people probably get distracted by the nearby Jardin Alpin. As well as four climbing structures there is a large concrete slope whose purpose is a mystery. A sign warns against cycling or skating down this slope.