I want to use the rapid iot kit for making home automation project which click board is helpful also i want to know that should we connect two rapid iot kits with each other .
I hope you are doing great.
Please look at the click boards that we provide Docking stations and Click boards™ | NXP
I am not sure what is the exact project that you want.
However, you could connect to Rapid IoT boards using Bluetooth LE, one as a central and the other as a slave.