Space-saving and convertible furniture is one of the best solutions for small spaces. And the design geniuses keep on giving and coming up with pieces that transform how we perceive regular furniture.Take 'Tumble', for example, that fluidly adjusts to your needs. It can be an armchair, a lounge chair, or even a table. The 'Tumble' is made of interlocked hollow blocks that you can not only rearrange but also use for storage, as well.