"Tinkering" refers to the process of experimenting or making small adjustments to something, usually in a hands-on and playful manner, in order to improve it or understand how it works. Full definition
And also with tinkering with head count on the overall firm or any trends there we should think about through fiscal 2018. (seekingalpha.com)
Startup: Education is interested in trying new, bold things instead of tinkering with what has been. (gse.harvard.edu)
The S3 has a fresher look to it that doesn't tinker around with Android too much (minus some difficulty in making folders and the inclusion of the Menu button). (digitaltrends.com)