bout footpad detection on a lighter rider is worth keeping in mind — at 30kg an 8-year-old may need some experimentation to get consistent engagement, so testing in person before buying makes sense. The comment about the rider at 88kg struggling on a PintX is also fair; if you end up wanting your own board for regular riding at that weight, a model with more power would likely suit you better than sharing the same spec as your son. Starting him on the regular Pint seems the sensible choice.