If someone does or says something bad to you, but then apologises for it, should you forgive them no matter what? Even if you don't really feel it in your heart?

Brains Trust: Lyneham Primary School: Neve, Ashwyn, Alice, Ava, Sammy.

The Titanic cruise ship hit an iceberg in 1912 and sank to the bottom of the ocean. Lots of people died because there weren't enough life rafts for everyone. Women and children were offered seats on the lifeboats first because of their age and gender. But is that fair? Are the lives of kids more precious than the lives of adults?

Guest: David Dyer, author of The Midnight Watch.

Brains Trust: Buranda State School — Meena, Caitlin, Banjo, Rosey, Hailey and Rex.

Imagine if you were being watched every second of the day to make sure you behaved well. And then you got rewarded or punished depending on how you acted? In this episode, we take a long hard look at Santa Claus, because news flash, we are told he's watching you day and night.

Meet Oedipus. He's the main character in one of the world’s oldest stories. He lived a long time ago and he did some pretty bad things. But was it his fault or was it fate? Was there anything he could have done to avoid tragedy? Join Molly, Carl and Matt as they sing their way through an ancient tale of terrible misfortune. 

Molly, Carl and Matt become lost at sea, they've run out of food and they lack basic survival skills. So, would it be okay for them to eat each other if they get really really really hungry? Maybe don't listen to this episode while you're eating!

This season we go on a little adventure in our minds. Join Molly, Carl and Matt as we imagine what the world might be like without things like schools and sadness and punishment. Would everything be better without them?

Imagine if something private you told a friend could be shouted out for the whole world to hear? Or if an embarrassing bodily function was shared with everyone? Some people say privacy is only necessary if you have something to hide, but are there other reasons to keep certain things just for yourself?

Brains Trust: Plenty Parklands Primary School in Mill Park, Melbourne: Ibrahim, Kiara, Victoria, Vinugo and Sienna.

We often feel sadness and heartbreak when something bad happens, like when a much-loved pet dies or someone at school doesn't want to be friends anymore. Or even when your sports team loses the grand final after you've trained really hard for it. Would life be better if you could magically make that sadness disappear?

Brains Trust: Plenty Parklands Primary School in Mill Park, Melbourne: Ibrahim, Kiara, Victoria, Vinugo and Sienna.

What's the point of school anyway? That's a question lots of you have written to us to ask. Nearly every day of the week for years and years and years, you have to get up, put your uniform on and go to a big building full of other children, just so you can learn stuff. And then once you're in the school building, grownups get to decide when you're allowed to eat your lunch and when you're allowed to play. It's tiring and sometimes boring. So should we just get rid of schools?

Brains Trust: Plenty Parklands Primary School in Mill Park, Melbourne: Ibrahim, Kiara, Victoria, Vinugo and Sienna.

What if there was no fine for letting your dog poo on the footpath? No consequences for hitting your brother or sister? And teachers never gave detention for breaking a school rule? If we lived in a world without punishment, would we all start just doing whatever we wanted? Or are there better ways to deal with people doing the wrong thing? 

Brains Trust: Plenty Parklands Primary School in Mill Park, Melbourne: Mara, Roni, Alana, Isaac and Adele.