Amazon.com: GobiDex Gemstones Dig Kit, Solar System Science Kit for Kids, Excavate 15 Real Gems, STEM Educational Space Toys Planet Collection Kit, Archaeology Geology Science Projects Gift for Boys&G
部分用户$19.99,额外$4 coupon+5%promo code,还有买两件6%promo,最后到手$13多。小朋友可以坐在那里dig很久。
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