I opened my door to two little girls.I had met Alyssa,six,two weeks before.Since then,she'd waved to me every time she passed my house. Hello.Grandma Bonnie!Alyssa said.This is my little sister,Ariana.She's three.To her very nervous sister,It's OK,honey.You'll like her.The three-year-old held a bouquet（花束）in one hand,and the other gripped（紧握）a tiny notebook and a huge broken crayon.Go on,her big sister urged,tell her. Ariana looked at me seriously.I want to help raise money for my preschool,she said,holding out her flowers. So I'm selling these for one dollar a bunch. I