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.
Toilet paper rolls are those items that we use every day. Instead of just throwing those empty toilet paper tubes out, we can repurpose them as creative crafts for kids or home decoration. Here are Homemade Toilet Paper Roll Crafts for your inspiration.