Most of the balloons released are made of hydrogen, and now the country has explicitly banned the use of hydrogen to fill the pellets. Because it will explode when it meets an open flame (cigarette butts, etc.). ), it is easy to hurt people around, which is very dangerous.

However, there are still many profitable small businesses selling hydrogen balloons. You can't express a balloon when you can't guarantee its filling. The courier company will check the delivery items when you submit them. It is forbidden to express inflammable and explosive articles for you in this way.

So, you don't have to think about the following question, how to make the balloon burst automatically.

If you have the heart, you might as well bring such a box to her yourself. You should prepare a needle and puncture the balloon at the right time to surprise her. Girlfriends will want to spend a happy birthday night with you more, and gifts are secondary.

I have to envy your girlfriend. You love her so much.