Equal amounts of Portland cement powder, peat moss and perlite or vermiculite. Water. Optional colorants. Recycled cardboard boxes, take out containers, plastic bowls, anything that's the size you want to make...mix it to thick mud consistency (holds its shape but doesn't ooze liquid). You can make all sorts of cool stuff for the garden, from simple pots to sculptures. I'm planning a fountain, would love advice from experienced hypertufa crafters.