Walmart offers the LEGO Minecraft The Cave, model no. 21113, for $13.99. Opt for in-store pickup to dodge the $5.97 shipping charge. (Amazon and Target have it for the same price.) That's tied with our May mention and the lowest price we could find by $3. The cave includes ores and minerals, a waterfall, lavafall, obsidian, pickaxe, chest, bread, TNT, zombie, and a spider.