When it comes to sleepovers, planning ahead is crucial. So, don't forget to pack your essentials like pajamas, toothbrush, toothpaste, and any personal hygiene items you might need. A sleeping bag or blanket is also a must, just in case your friend runs out of spares. A change of clothes for the next day is recommended.
You might also want to bring a few of your favorite snacks and drinks to share. And let's not forget the entertainment – board games, a couple of your favorite DVDs, maybe even some video games would surely add to the fun!