This item is a 79-piece "Blooks Building" toy set in a carry bag. It features colourful building blocks, including pieces to build windmills and small character figures. The packaging indicates it is made from "bare non-toxin quality" material and is marketed as "Puzzle Paradise". 
This specific product, or very similar generic versions with different piece counts and slightly varied branding like "Karol Blooks", are available through various online retailers. 
Are you interested in seeing purchasing options for similar building block sets with windmill features?