Dana Ellingson of Eagan turned 9 in June, but she decided to wait half a year to celebrate her birthday.
This month, she held the belated bash at Eagan's Trapp Farm Park Tubing Hill, where she and her friends spent an afternoon flying down the snow-packed slope and later enjoyed pizza and cupcakes.
"You can go really fast," Dana said.
Even on days when temps are nearing 30 degrees and the snow is a little stickier, it's slick and fast. The breathless girls in snow pants took off their hats and unzipped their jackets as they ran up the hill over and over again.
"I lost count," said Raena Erickson, 8, of St. Paul. "It's really great. It's just really fun."
"We make trains with these things," said Eleanor Richards, 9, of St. Paul, prior to the 10 of them tying their tubes together to head down in one big raft.
"When you go down, you almost feel like you're flying," said Sonja Henze of St. Paul.
Neal Kunik, a winter program assistant at the park operated by Eagan Parks & Recreation, agrees, saying, "You can get going pretty fast down the hill, but it's safe with the tubes."