Do you have dented Ping Pong ball?
With easy step video, I'll show you how you can inflate your dented Ping Pong.
Get a glass of cup and add hot water, place the Ping Pong ball into the hot water and sink the Ping Pong ball under the hot water for few seconds. It will inflate by itself. The air inside the Ping Pong expand under hot water and it inflated.
Please watch the video for more info.