Parties can be as simple or as elaborate as you wish. Some people like to decorate
full out for the theme and others put more time into the games and activities. Decide
what kind of effort you would like to put forth for your party. I usually like to
keep the guests level of activities somewhat organized so I tend to error more on
what the kids will be doing, but it is truly a personal choice.
As the host of the party you can get pretty creative for you theme with or without
spending a lot of time and money in the process.
Set a budget for supplies and decorations (based on the number of guests). Helpful
hint: Use that budget to determine what supplies are needed first. Then after all
the necessaries are bought, then think about decorations. This method is usually
a money saver.
Getting creative for decorations can also help. The Internet is a wonderful source
for pictures, fonts, and ideas for making items to fit your theme. Shopping sales
ahead is a great way to save money on decorations for your party. Do not forget
about fabric and craft stores as well as party stores. All can provide great ideas.
If time is more of the issue for you. There are plenty of pre-made decorations that
you can find either in stores or on the Internet.
Consider your time and budget with these and shop away.
Consider your theme and generate ideas of what you want by checking out online sources
or shopping. Some people pick their theme by letting the birthday child select the
birthday plates and then build a party around that. Some pick their theme and look
for things to go with the theme. Either way works out well.