AI plans the theme, the timeline, the food quantities, the games and the shopping list in about 10 minutes — costed against the budget you set.
Theme, invitations, food, games, decorations, favours — none of them are hard, but there are twenty of them and they all need deciding.
You save fifty pins and still have no plan. Nothing matches, the budget creeps, and the stress lands the week before.
Venue, cake, food, decorations, favours. Each one seems reasonable on its own, which is exactly how the total gets away from you.
Age changes the games, the food, and how long the party should run. Get it wrong and you have bored kids an hour before pickup.