Walmart offers the LEGO Creator Propeller Plane, model no. 31047, for $12.99. (For Prime members only, Amazon has it for the same price, as well as Target.) Opt for in-store pickup to avoid the $5.97 shipping charge. That's tied with last week's mention as the lowest price we've seen. (It's also the best today by $7.) This 3-in-1 set can be assembled as a propeller plane, hydroplane, or helicopter.