Amazon offers Prime members the Mega Bloks First Builders Big Building Bag in Pink, model no. DCH62, for $10.71 with free shipping. (Non-members can spend $35 to bag free shipping; otherwise, it adds $7.01.) That's tied with last week's mention as the lowest total price we've seen. (It's the best now by $13.) This 80-piece set includes an attachable wheel base for making vehicles.

Orders placed by December 18 are guaranteed to arrive by Christmas.