Happy New Year to all our readers! Y5 scientists are straight back into the swing of things and have been working as consultants to a firm of Adventure Playground Engineers, Don T Falloff & Partners.

Their brief was to investigate a range of materials and recommend which one would be most suitable for the hook on a zipwire. Clearly, the material would have to be sufficiently robust, but the Y5 scientists had to use their expertise with friction to ensure the hook was neither too slippy, nor too grippy, so that the Bratz dolls’ zipwire experience was both safe and exhilarating.