Events included a relay race with a cactus baton and rolling across 248 upturned plugs.
The contestants also had to take part in a barefoot skipping race on a track with strategically-placed toy building blocks and a sack race where the sack contained stinging nettles.
And there was a stomach-churning egg and spoon race involving eating Chinese delicacy - 1000-year-old eggs.
The winning team will be rewarded with a school disco.