You said in your profile that you could answer these, so would you please?
What are/is Travel Bugs, Geocoins, Cache-in Cache-out,and the 2006 Jeep 4x4 Geocaching Challenge
I have no problem answering these questions. These are all various tracable items...
Travel Bugs - A travel bug is a "dog tag" that can be purchased from Geocaching.COM. The tag has a unique number and is attached to a trinket of some sort. The trinket is then carried from one cache to another and tracked online via the unique number. Frequently these travel bugs have a specific goal, for example, to visit Hawaii. If you find a travel bug you may help it on its way or just simply "log a find" by using the travel bug number.
Geocoins - Work the same way as a travel bug except the trinket is a coin with an engraved number on it. There are thousands of personalized geocoins out there and many have a unique icon on GC.COM.
Cache-in/Cache-out - This is a special type of geocaching event in which everyone picks up trash in a park.
Jeep 4x4 - This is also just like a travel bug except it was sponsored by Jeep. When you found one of these you either wrote a story or took a picture about some geocaching event/hunt. This story/picture was submitted to Jeep and they randomly picked one story to win a brand new 2006 Jeep 4x4.
For more info be sure to check out this website:
Let me know if you need any additional information!