Some future mothers-in-law get pretty creative when it comes to testing their daughter’s boyfriends: a New Zealander Daniel Gray came to visit his girlfriend’s family in Canada for the holidays and was asked to build a rainbow igloo in the backyard. The igloo was built out of almost 500 ice bricks that were made by freezing colored water in milk cartons. The whole process took around 150 hours. Even the rest of the family and a neighbor were summoned to help out, all with -25 °F (-31 °C) outside!