This delightful concept belongs to Moscow based designer Kate Pashinova. The Olly stool is an example of collapsible furniture, that folds flat for easy storage. The principle is simple – the base of the stool is a cross-like construction. When unfolded, it gives stability to the structure. And by rotating one of its parts, the folding is achieved. The piece can be hung on the wall or stored in a closet when not in use.