The most popular OGO ride. The H2OGO! 1 person with 40 litres of water inside one OGO rolling 250 metres downhill in a frenzy of rushing water. Super slippery … so you feel like you’re sliding in a rotating waterfall. Warm water in the winter and cool water in the summer. The OGO is a 3 metre (11 foot) transparent sphere lovingly constructed from over 100 square metres (300 square feet) of plastic, more than 1,000 little plastic anchors, about 600 multi-coloured strings and endless hours of welding, glueing and tieing combined with sweat, tears and billions of teensy little kisses to make a beautiful big ball that you can jump inside and roll down a hill.