help me how to make weightless stones in Unity!

I need the objects to stand still and then when they are stepped on they should release down a little and then return to their initial position (like flying stones in movies)<img src="https://img.itch.zone/aW1nLzE2ODMwMjUwLnBuZw==/original/eZkjEE.png">

(moved to the right category)

You have to add a collider and a rigidbody to your gameobject. Disable "UseGravity" and "IsKinematic". Under constraints set all rotations to freeze.

Attach a script that simulates the physics you want. For example:

public class Bounce : MonoBehaviour
{
    private Vector3 _initialPosition;
    private Rigidbody _rigidbody;
    void Start()
    {
        _initialPosition = gameObject.transform.position;
        _rigidbody = GetComponent<Rigidbody>();
    }
    void Update()
    {
        var force = 50 * (_initialPosition - gameObject.transform.position);
        var damping = -5 * _rigidbody.velocity;
        _rigidbody.AddForce(force + damping, ForceMode.Force);
    }
}

thank you my dear friend very match!