For the May Event at Hogwarts
"Daaaadddd," James whined, tugging on Harry's shirt sleeve. "Walk faster! Albus and Lily are gonna get all the candy!"
Harry, carrying James brides-style in his arms, dutifully sped up. Beside him, Ginny kept pace as they followed their two other children to the door of a spookily decorated house.
"You could've chosen not to dress as a mermaid, you know," she said amusedly. "Or you could've gone for a mermaid with feet."
"Mermaids don't have feet, mum," James said sulkily. The three of them caught up to Albus and Lily just as the door opened.
"Trick-or-treat!" they said in unison.