SINGAPORE - Changi travellers can get up to some bouncing fun at the future Jewel Changi Airport, which opens in 2019.

There will be a 250m-long bouncing net built at the topmost floor, as well as a 50m long walking net, which offers a bird's eye view of Jewel's interior, at some 25 metres above ground level.

These details of the Sky Nets attraction - one of the highlights of the Jewel mixed development - were revealed on Tuesday (Feb 6), at the Singapore Airshow held at Changi Exhibition Centre.

To give airshow visitors a preview of the 1,000 square metre attraction, Changi Airport Group (CAG) has erected replica of the bouncing net at its exhibition booth.

The mock-up spans 20 metres long and eight metres wide, with the highest point suspended at 2.4 metres above ground.

At any one time the display can take 15 adults. The actual Sky Nets will be able to take 300 visitors at any point on both its walking and bouncing nets.

The $1.7 billion Jewel is a development with five aboveground and five undergound storeys that will house about 300 shops and food and beverage outlets, with attractions such as a 40m high indoor waterfall and garden.

Built in front of Terminal 1, where an open-air carpark used to be, Jewel is aimed at further boosting Changi's attractiveness as a hub for transit travellers.

Ms Joyce Tan, head of corporate and marketing communications at Jewel Changi Airport Development, said: "To date, we have seen good progress in (Jewel's) construction - 70 per cent of structural works have been completed and we are pleased to look forward to our 2019 opening."

Jewel, which has a steel and glass facade, is designed by renowned architect Moshe Safdie. It is a 51:49 joint venture between CAG and CapitaLand Mall Asia.

It is connected to Terminal 1's arrival hall and will be linked to Terminal 2 and 3 via pedestrian bridges.

Correction note: The story has been edited for clarity.