We added this episode of Suzy's World especially for Allergy NZ and all our friends with allergies. Everything we can do to make a friend's life easier has to be a good thing, so even if you don't have an allergy yourself it's a good idea to watch and learn so you can look out for your friends.

Suzy risks putting her foot in her mouth as she investigates what causes cavities in our teeth.

“Healing Honey” explains how mānuka honey has special healing properties that make it valuable for medicinal purposes. It discusses the technological experimentation and modelling that went into the development of a honey bandage to treat wounds.

Māori use kawakawa as rongoā (traditional medicine). But when scientists tested the kawakawa leaves they said there was no scientific evidence to support the plant’s medicinal properties. Chris Ryan took a closer look at the scientists’ investigations and noticed that they had not used traditional methods to prepare the kawakawa. He wondered if this might have affected their results. So Chris decided to carry out his own investigation.

What are headlice? Suzy gets in "over her head" when she investigates these wee critters that like to make your head their home.

Nanogirl visits a superbugs lab in Auckland to discover whether all bacteria is bad.

Are you feeling fit and healthy? Check your heart rate while resting and after physical activity by making your own stethoscope.

Use water droplets to help make a basic microscope that lets you examine a range of objects in greater detail.