Two points come to mind:
!) "Why?"->"Why do hotdogs come in packs of eight, and hotdog buns come in packs of ten? 40, that's why; the lowest common denominator." Or perhaps "Sometimes, "why"?"
2) "How to start spoiling [our first] grandchild..." Well, an Alembic series II ukelele in koa and a hippy sandwich binding would be a heck of a start. Given the construction time, it should arrive at just about the perfect point to fit the kiddo's hands.