Messy, a monster, explores science questions that children ask about the world around us. The sky is full of big grey rain clouds in the real world. Messy watches his sandcastle outside get washed away by the pouring rain. Why does it have to rain? He competes in the OKIDO flower competition and finds out why. 

Messy, a monster, explores science questions that children ask about the world around us. Messy loves balloons, whatever colour they are, but what is inside them to make them float up high into the sky?