Sleepover Party is designed to offer young gamers everything they need to plan and host overnight get-togethers, from shopping lists to an assortment of activities and mini-games. A virtual hostess named Aimee helps players choose from a variety of party themes, create a list of potential guests, and decide what decorations, food, and makeup to buy. Mini-games include "Fortune Teller," "Copy the Host," "Burst Ballons," and the Balance Board-enabled "Balance the Tray" and "Avoid the Pie," while off-screen activities find gamers giving each other makeovers, making friendship bracelets, and decorating cookies.