This Cinesound newsreel from the 1930s shows some adventurous Melbourne 'skiers' using snow skis on a strip of hay on a grassy slope. It's crude but effective and even allows some of them to attempt small jumps.
Grass skiing has become a major international sporting competition in its own right but is also a training method for alpine skiers before the winter season commences. The 'skis' used for grass skiing are short with rolling treads or wheels, similar in design to inline skates.
From Cinesound Review No. 0241