They pumped them up, chucked on jackets and shorts, and using an old kayak paddle, set sail.
"This is the best fun ever," said James, a Fernside School pupil.
James, who along with his elder sister goes to Rangiora High, kicked back in the lilo as if he was lounging on a Rarotongan beach.
Rose noticed the plastic bottom has fallen out of their boat.
Residents in wet-weather gears and umbrellas laughed and waved as they walked by, checking out the worst of the North Canterbury town's flooding.
The relatively-new residential estate to the west of the town appears to have a blocked drain at its entrance, creating the impromptu lake, as well as a cascading river eastwards down neighbouring Johns Rd.
But for the McEwan kids, they couldn't be happier - if not a bit chilly.
"Another lap and then we better go home and dry off," said Rose.
Twenty minutes later, they're still at it; soaked to the bone and laughing their heads off.