To make the "Pyramids of Giza" from snow, all you need to have is snow and some free time. This is my own version of the pyramids, along with sphinx . Just follow the steps, learn them and have fun.
Step 1: Preparation
Make a snowy cubic model and try to gather as much snow as you can in there. You can use some instruments like shovel, plastic bags and dusters to speed up your work.
**Remember to compress the snow every few minutes, so that you don't face any problem later on.