When touched, objects should “stick” to each other, how can this be done?

Question

Unity

I need that right at the contact of 2-3 objects, they stick as if they were originally a single whole.
In my case, the objects are rectangles. I haven't been able to find a solution since yesterday.

Answer 1

Googled about Set.parent. Something like that. You simply make these objects child objects upon contact and they become one.
https://youtu.be/oHjXmnF8mj0
This video will help you.