Push the flower tips into the styrofoam, like this, arranging them how you like.
Once you've placed one and have made a hole.
Add some hot glue to it and place the flower back on to adhere it.
Continue to glue and fill in until your ball is covered.
To have your topiary hanging, use a long piece of ribbon and a thumbtack.
Add some hot glue, place the end of the ribbon down and the thumbtack on top. You may not need the the thumbtack, but I found the tack seemed to adhere the ribbon to the foam ball better.
Now you are finished!
We hung her flower topiary with some hanging butterflies we had leftover from her Pinkalicious party, remember that one?
She loves it and it looks completely sweet and girly in her room, just like her!