Home Depot offers the KidKraft Farm Train Set, model no. 17827, for $41.99. Opt for in-store pickup to avoid the $6.49 shipping charge. (Amazon charges the same with free shipping, while Walmart offers it for the same price with pickup.) That's the lowest price we could find by $4. This 75-piece set includes a barn, farm animals, and windmill; it's compatible with Thomas and Friends and Brio wooden train sets.