Mix half of the guava juice and yoghurt together and set aside. For the first layer, divide the berry juice equally into your Zoku Pop Maker or regular Popsicle molds and add blueberry halves. Allow the first layer to freeze completely.
For the second layer, add the grape juice then leave to freeze. Pour the guava juice into your mold and freeze completely.
Finish with a final layer of guava yoghurt mix, freeze and serve.