About this item:
316-page detailed tutorial (including basic electronics knowledge) -> The download link can be found on the product box. (No paper tutorial.) 
225 common items -> Includes all parts needed to complete the projects in the tutorial. No soldering required. (micro:bit is included.) 
44 interesting projects -> Each project has circuit diagrams and verified code with detailed explanations. 
2 programming languages -> The easiest to use Blocks and the most popular Python code.