This time, I would like to bounce the object. Prepare a cube and apply a red material as shown below.

Add components to the prepared cube

Physics > Rigidbody.

Then right-click in the Project and select Create > Physic Material.

I named the Physic Material “bound” this time.

Next, with this bound selected, set the Inspector’s “Bounciness” to 1. 1 seems to be the maximum value.

Once the “Bounciness” settings are made, select the red cube, drag and drop the bound into Inspector, and it will be applied as follows

Now when you press play, the red cube will drop down and bounce when it hits the ground.