Fill the balloon with water . This image illustrates why you don't completely fill the balloon you should always leave some room in the neck of the balloon, then as the form dries the pressure has somewhere to go and your clay wont split.
Perfect for modern homes.this "window-box" style Succulent dish garden. It includes a "thriller". a "Sensevaria" (Mother-in-law's Tongue) as the tall accent. No information given about the "fillers" and "spillers".