At a birthday party, you can watch a variety of movies depending on the age group and interests of the guests. For a children's birthday party, animated movies or family-friendly films like Disney classics or Pixar movies are a great choice. For a teen or adult birthday party, popular and entertaining movies from different genres such as comedy, action, or drama can be enjoyed. Ultimately, the movie selection should cater to the preferences of the birthday person and their guests to ensure a fun and enjoyable movie-watching experience. **

Streaming HD movies can be legal or illegal, depending on the source of the content. If you are streaming from a legitimate source such as a licensed streaming service like Netflix, Amazon Prime, or Hulu, then it is legal. However, if you are streaming from unauthorized sources that distribute copyrighted content without permission, then it is illegal. It is important to be aware of the source of the content and ensure that you are accessing it through legal means to avoid any legal issues. **

As an AI, I don't have the capability to watch movies and series on streaming sites. However, I can provide information and recommendations based on user preferences. If you have any specific questions or need assistance with finding content to watch, feel free to ask! **

There are several websites and platforms where one can watch series and movies online for free, although it's important to note that the availability of content may vary by region. Some popular options include streaming services with free ad-supported tiers like Pluto TV, Tubi, and Crackle. Additionally, some networks and studios offer free content on their official websites or YouTube channels. However, it's important to be cautious and ensure that the sources are legal and legitimate to avoid any potential copyright infringement issues. **

Yes, one can watch movies online through various streaming platforms such as Netflix, Amazon Prime Video, Hulu, and Disney+. These platforms offer a wide range of movies that can be streamed directly on devices like smartphones, tablets, smart TVs, and computers. Additionally, some websites also offer free movies to watch online, although the legality and quality of these sites may vary. **

Yes, the Nintendo Online Expansion Pack can be purchased separately from the regular Nintendo Switch Online membership. The Expansion Pack offers additional benefits such as access to a library of Nintendo 64 and Sega Genesis games, as well as exclusive in-game content for select titles. Players can choose to upgrade to the Expansion Pack tier while maintaining their existing Nintendo Switch Online membership. **

To watch Amazon Prime movies without the other party seeing it, you can use the "Private Browsing" or "Incognito" mode on your web browser. This mode allows you to browse the internet without saving your browsing history, cookies, or site data. You can also use a separate device, such as a smartphone or tablet, to watch Amazon Prime movies privately. Additionally, you can use a VPN (Virtual Private Network) to mask your IP address and location, which can help maintain your privacy while streaming content. **

Some good movies to watch at a sleepover party could be classic comedies like "Mean Girls" or "Clueless" for some laughs, or popular teen movies like "To All the Boys I've Loved Before" or "The Fault in Our Stars" for a mix of romance and drama. For those who enjoy horror movies, classics like "Scream" or "A Nightmare on Elm Street" could add some excitement to the night. Ultimately, the best movies to watch at a sleepover party are ones that cater to the preferences of everyone attending. **