512GB 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 ASUS
ASUS Zenfone 11 Ultra Qualcomm Snapdragon 8 Gen 3 Mobile
SmartTeck
ASUS ZenFone 11 Ultra AI2401-16G512G-BK-ZF 17.2 cm (6.78") Dual S -