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app control programming robot building blocks with exquisite paper instructions restore the details truly, you can understand the general structure of the programming robot during the assembly process factory direct sales, delivery within 7 days, and we will pack the goods in strong cartons if the parts are missing or damaged after receiving the goods, we will reissue them for it is a toy that turns imagination into reality through both hands. it can stimulate our wisdom and bring a lot of fun to life.syi