Seedling ID if poss please

Before lockdown, a neighbour's child kindly gave me two seedlings in a tiny put which she'd planted at Brownies, but she didn't know what they were and could only tell me that Brown Owl had said they have purple or white flowers - bless her! After two months on a windowsill, they look like this now. I have re-potted each one into bigger pots. Any ideas as to what they might be please?