兒童教室體驗日邀請卡（蠟筆拼貼風）

prompt

Illustrate a joyful open-day invitation card for a children's learning center named {school_name}, portrait 5:7 ratio. Art direction: hand-drawn crayon and cut-paper collage style on a bright sunshine-yellow background — wobbly rainbow arcs, paper-airplane doodles, stars and scribble clouds framing the layout. Headline 'OPEN DAY!' in chunky multicolor crayon lettering across the top third. Middle section lists the date {event_date} inside a torn-paper banner and highlights activities: {activity_list}, each with a tiny doodle icon. Bottom edge shows a row of diverse smiling kid characters in simple crayon style, with {contact_info} printed in clear rounded type beneath. Keep text zones flat and readable; full-bleed, print-ready.