Tool that you can use to click on specific part, and change something like a color or size?

?Can someone help me with this problem? I want to create a tool, so you can click on a specific part. When you click the part with the tool, the part will change something like a color or a size. I hope you understand:-)

As cringe_worthey has said, you should try it by yourself first. Scripting Helpers is a lua roblox coding HELP site. Not a request site.

If you make your own code and send it here we can help improve it.