Public Lab is a DIY environmental public science community. You can purchase inexpensive kit - such as a build your own spectrometer.
Additional information
Public Lab is a community where you can learn how to investigate environmental concerns. Using inexpensive DIY techniques, you can contribute to changing how people view the world in environmental, social and political terms.The platform provides a database of free information and open source software. There is a community of users and social network to discuss science. There is also a list of inexpensive kit available to purchase with instructions and ideas for experiments - such as a build your own spectrometer.
Related Learn Chemistry resources:
https://edu.rsc.org/1290.article
https://edu.rsc.org/1289.article
