The Gravity standard developed by DFRobot, a company well-known in the electronics and amateur robotics community, is very popular among users due to its ability to easily connect sensors and actuators to Arduino frontends and their clones. It is worth knowing that apart from the modules themselves (containing e.g. temperature, humidity, shock or light level sensors) and the executive modules, e.g. with relays, motor drivers or LEDs, there are also base overlays available. They allow simultaneous connection of multiple modules to Arduino series boards (or other boards compatible with popular ecosystem of Italian manufacturer). In this category, we present the most interesting proposals from DFRobot's offer, which can be the basis for the construction of many interesting devices.