This product is replaced by a new version: Grove - Starter Kit V3.
GROVE is an open modular toolset, designed to minimize the difficulty of fundamental electronic engineering. It is formed by functional modules TWIG and interface board STEM. Each TWIG has unified 4pin interface and standardized jigsaw shape for easy combination. They can work with major existing development platform (like Arduino and compatible boards, beagle board, Xbee, and etc) via STEMs.
For all Grove users (especially beginners), we provide you guidance PDF documents. Please download and read through Preface - Getting Started and Introduction to Grove before your using of the product.