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.