Snow Shovels.
Every year there is a mad dash for shovels at places like Home Depot right before snow storms. Why? Because the snow shovel is one of the most unique items on the market today. For many other items, there is an alternative item that can do the job (e.g. the microwave can be replaced by a stove or even just a fire). The only other item that could work decently is a shovel, but technically, the snow shovel is a variation of a shovel, not a different item. You can make art or even play sports with a ton of different items, but the only way to efficiently shovel snow is to use a snow shovel. Snow shovels are essential to having a car that you can drive, a cool fort and a cleared out sidewalk that someone can't slip on.
I bet they used a snow shovel for that...
and that...
and definitely for that.