256GB internal storage isn't the largest on the market but should do fine for most people. A phone well suited for your kids, or yourself if you need an extra phone.
From OnBuy
OPPO RENO 10 PRO 12+256GB DS 5G SILVERY GRAY OEM
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Smartphone Oppo OPPO Reno10 Pro 5G 6,7" 256 GB 12 GB RAM Octa Core Snapdragon 778G Grey Silver
Shopaide
Smartphone Oppo OPPO Reno10 Pro 5G 6,7" 256 GB 12 GB RAM Octa Core Snapdragon 778G Grey Silver