If you are looking for great resources for activities at your camp or on your retreat, check out the following site.  Some of these games can work for your child's birthday party as well.  After working at camps, retreats, and schools for over 20 years, I love large group games.  Click Here for a great resource.

Here is a link to some great tips for birthday parties for 7 - 8 year old children.  Notice what she says about hiring entertainers in the last paragraph.  Hiring a great magician who has had years of experience can make your party a great memory.  The price is certainly competitive with all the other birthday party outings . . . in fact, a magician can be a great deal when you take into consideration not having to travel to another

There is a wonderful website with videos of Gospel magic -- magic used to share the Good News of Jesus Christ.  They have produced a good number of 30 minute shows made up of presentations by various magicians.  Perhaps some of these ideas might provide you with an idea of how to explain the Gospel.  The production quality varies, but the ideas are very helpful.  Take a look - http://www.christianmagician.org