Walmart offers the Hot Wheels Super Loop Chase Race Track Set, model no. BGJ55, for $26.10. (Amazon charges the same with free shipping for Prime members, while Target offers it for a few cents more.) Choose Site-to-Store pickup to avoid the $4.97 shipping fee. That's the lowest price we could find by $5 although we saw it for a buck less two weeks ago. It features a 3-foot tall loop and can be connected with more sets.