the mountains. >> we're just arriving in numbi. it's one of the largest mines in the area and the most recent one to be certified. >> it's been four years since u.n. forces and the congolese army cleared this area of armed groups, but it's only recently been designated "conflict free". in numbi, we met ombeni chikala, a supervisor at a local tin mine. for 15 years, he's made his living as a miner starting as a digger and working his way up. >> on the day we visited ombeni's mine site, agents logged and tagged a 6 kilo bag of tin, a process required for every single mineral shipment leaving congo to be legally sold in the west. >> have you heard of the dodd-frank law? >> what do you think of it? >> are miners across this region affected by the system of traceability and by the dodd-frank law? >> jean ngerageze is the president of a local mining cooperative. >> we asked jean how miners here were able to make a living before the site was certified. >> did you have the same system six months ago? >> nyabibwe is the mine that was held u

and ella and leah are making this yummy -- this is yummy numby maker where they get to make mini treats, food, snacks. you want to give your aunt hoda a taste? >> is it lactose free? we checked. >> and these mini treats taste just like the real thing. lots of flavor. yummy. >> this is normally 14.99. let's go to shayna. she is dressed just like her strawberry shortcake doll. it's a gift set. it's the strawberry shortcake it's usually $14.99. we met shop kins last year, teeny, tiny collectibles. now we're into fashion, toiletries and we have our scoops ice cream truck. great place for girls to play and display their shop kins. this is normally $19.99. it is $15 at walmart. it's a thrill to go to the amusement park and be on a rollercoaster. what about building one? >> wow! >> look at that! >> that looks like fun. >> 16 feet of track. you build it 3 feet high. toys-r-us for $19.99. we know we like to sneak a hair of learning. this is wind power 2.0. they get to build a wind mill, build different vehicles. they recharge the battery on here, put it on their vehicle and off they go. this is