Tangible Interaction as literal as it can be

user interfaces can not be more friendlier than these, it has the element of physical representation, it also has created easy data manipulation, it actually try to put away the keyboard, and it uses real artifact not the metaphor anymore for easy interaction (real post it with embedded chip, instead of interface icon. so wen you need to run Microsoft word just move the post it higher then the program will run. The post it can be made of digital ink paper , so than image appeared have the look an feel of writing in the post it. So thank to Don Norman, Ishii, Dorish and many other.