We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› by Ellen Lee and Wirecutter Staff Many 9-year-olds can take on grown-up ...
Recommended ages: 3 years and up A high-tech marble run Gravitrax Starter Set Marble Run, available on Walmart and Amazon from $69.99 The GraviTrax Starter Set lets kids design their own marble ...