<human>:  Help me plan a surprise birthday party for my brother.
<bot>: To plan a successful surprise birthday party, you'll need to start by selecting the right venue. Consider the kind of atmosphere and size of the area that will be suitable for the number of guests you plan to invite. Choose the right decorations depending on your brother's interests, such as balloons in his favorite colors, banners, and streamers. Next, decide on the food and beverages, and make sure it is tasty and tailored for the occasion. Then, decide on the other activities such as games, music, and entertainment that will make the party memorable. Lastly, involve your brother's friends and family to help put together the perfect surprise.