Bubble

This may be a stupid question but I don’t know what I’m doing and cant find any guide.
I want to create a bubble in a 2d platformer.

I have added a circle to my game and am then trying to add “Soap Bubble” material to it, thinking that may work but the circle just disappears. Any guidance appreciated.

Thanks

It’s a 2D game; you don’t need to use any material other than the standard sprite material.

If you’ve added a circle to your game, then I think you have added a bubble. If you disagree, then please explain what the difference is between the circle as it is now, and a circle that you would call a bubble.