What can you do with recycled materials found in your home or at school in 30 minutes or less? How about making a pizza box oven? Clear step-by-step instructions and photos make these sustainable science projects fast, easy, and fun! The activities in this book use common items from around the house and keep readers learning while they're busy having fun! Projects include: Musical bottles Cardboard stethoscope Flying hoopster Balloon hovercraft Mini catapult Pizza box solar oven Mini trebuchet Balloon-powered car