When the flowers and branches are all dry, start to assemble your centerpiece. You may want to place the branches in your vase before attaching the flowers to make sure the flower placement is exactly where you want it.
When your branches are arranged, use a hot glue gun to attach flowers to the branch. It is better to have an adult handle the hot glue gun, but the little ones will have fun picking out where the flowers will go. To keep the hot glue from dripping off the flowers, place the hot glue onto the bottom of the flower and hold it upside down for a minute so that the glue starts to get tacky.