DIY Maker Ultimate 37 in 1 Sensor Modules Learning Package Kit for Arduino UNO R3 Mega2560 Mega328 NanoProvide PDF Product Guide Come with a big plastic box which have a small separate compartment for each module With this 37 in 1 ultimate package you can do almost all the experiment you can think of, never need to worry about again you don't have proper materials. this do save you a lot of time so you just need to focus on your project, be more creative and make some amazing product !