Toys"R"Us offers the Imaginarium Safari Marble Run 55-Piece Building Set, model no. 5F63E81, for $14.99. Opt for in-store pickup to avoid the $5.99 shipping fee. (You can also spend $19 or more to qualify for free shipping.) That's the lowest price we could find by $15. This wooden set includes three jumbo marbles, 13 track pieces, a crocodile launcher, giraffe slide, lion pass, monkey flip, and elephant splash.