We love this fantastic book of lego projects which comes complete with the 87 lego pieces including bricks gears axles and rubber bands needed to complete each of the contraptions there are 16 projects to undertake and thanks to the clear step by step instructions and diagrams they can be completed without frustration from the speedster to the squeeseclaw grabber to the rocket racer and time killing machine there are hours of endless fun and challenges here for any budding mechanicbuild