Buy roses that have just arrived at the flower market and choose smaller ones. Before entering the flower shop, the roses are packaged into small packages, transparent or white mesh packages to ensure that the roses will not be opened before sale. After buying this rose that is still a bud, remove the small package outside, immediately put the bud into the balloon, and then put the rose that has been put on the balloon in water to absorb water for about 3 hours, because the rose will dehydrate when it arrives, and it is easy to lose its petals without water. After absorbing water for three hours, cut the branches according to the size of the balloon, and you can blow the balloon.