Who doesn’t like playing in the snow? Six inches of snow in Regent’s Park, and there’s enough to build an igloo. I did this one mostly on my own (the girls bravely staked out a nearby pub which sold mulled cider) with a square mop bucket. It took about two hours, but later builds demonstrated that pretty much scales with workforce and you can build one in about half an hour if you’re got four people and three buckets.
The trick is to put a peg in the ground with a string tied to it, so you can keep the radius constant. That obviously fell down a bit at the crown, where it all went a bit Kremlin. Quite hard to do a proper dome with only one pair of hands. I also recommend some waterproof gloves, and a piece of thick plasticard to act as an ice knife. Scoop snow into bucket, punch down to compact and pop out. You need to taper the first row of blocks so they spiral up from the ground, but after that, just keep going. Obviously I didn’t dig an entrance tunnel; Queen’s park and all that.
As I was nearly completed, a passerby did ask if I was Banksy; I suspect my denials may have been filed under “what he would say.”
The Stuff That Nick Built 