Not A Balloon.

Riddle: I become bigger the more you blow me, you can pop me but I can pop myself as well, and you can see me but sometimes cannot pick me up. What am I?

Answer: Bubbles.

Source: https://www.riddles.com/9571

I become bigger the more you blow me, you can pop me but I can pop myself as well, and you can see me but sometimes cannot pick me up. What am I? — Not a balloon. by Allie Blankenship v1.

Riddle: I become bigger the more you blow me, you can pop me but I can pop myself as well, and you can see me but sometimes cannot pick me up. What am I? Answer: Bubbles. — by Allie Blankenship v2.