Lillie-Rose’s design is now in the testing phase. Craig Fox posted an update on the Little Inventors’ website stating:

The 3D printed section which holds the dyno generator needed a bit of re-design, so that’s changed shape slightly and now includes a lid to hold the dyno in better. This now securely holds the generator in place whilst the lead turns it to generate power.

I’ve assembled all the parts together, which meant I could get my trusty assistant involved for some testing; Reuben the Labrador! He helped me do several tests of pulling the lead out to generate power. As Reuben pulls the lead out it rotates the generator in the lead, providing power to the USB port. A little red LED also lights up so you can see when Leashy McLeashy is working. A normal phone charging cable can then be used to connect the USB port on the generator to your phone, giving you some extra phone charge when out on a walk.