L.H.
Some friends of mine gave the envelope and a pink and blue decorated box to somewhere that blows up helium balloons, and then they went and picked up the box and set it up on a table until time for the big reveal. Then when it was time they opened the lid and the color of the balloons that flew out told them it was a girl! The balloons were tied together and I think the box lid was taped down so there was no chance of them flying out before hand. But I guess the balloons could be without strings if the ceiling isn't too tall!