Electronic devices for education and entertainment which can output words and designs on surfaces of sheets or mats, namely, an electronic device with an LED feature; computer programs for enabling an electronic device with an LED feature to receive words and designs which are output from smartphones, tablet PCs, personal digital assistants, personal computers and computers, and for outputting the words and designs on surfaces of sheets or mats coated with a phosphorescent agent; computer pro...

Posters; Trading cards