Use a permanent marker or a computer to write or print the party information onto clear labels. Peel the labels off the sheet, and attach them to individual oak tags.
Cut a piece of cord, about 14 inches long, and slip it through the tag's hole. Find a notch in the rock, and tie a double knot around it.
You can either hand-deliver the invitations or place them in a bubble-lined envelope and mail them for an additional cost.
Using the same oak tags and cord, create the name tags that will be attached to the water bottle and bag of gorp. Use a permanent marker to write the guest's name on the oak tag.
Cut a 12-inch length of cord, knot it at one end, and slip it through the tag's hole. Attach the other end of the cord to the key ring by tying a slipknot around it. Then, so each guest can keep track of his water, attach the key rings to the loop tops of the sports water bottles.
Add an equal amount of peanuts, raisins, and M and Ms to the plastic bags. Place the gorp-filled plastic bags inside the mesh bags, and attach them to the key rings. You can also add other treats, such as energy bars and pop rocks.
For Invitations and Name Tags: Permanent markers
Clear shipping labels
Nova-Brite cord (available at marine-supply or outdoor-sporting-goods stores)
Small rocks, about 2 ounces
Bubble-lined envelope (optional)
Carabiner-style key rings
Sports water bottle with loop top (see sources)
For Gorp: Dry-roasted peanuts (or use Cheerios or Fritos)
Resealable plastic bags
Actual rock climbing is only one element of this adventurous outdoor birthday party. The fun begins with appropriate invitations, made from -- of course -- small rocks, cord, and oak tags.
When the kids arrive, greet them with name tags, fashioned from carabiner-style key rings that they can take home with them. (A carabiner is an oblong metal ring used in mountain climbing as a connector and to hold a freely running rope).
Then, to help keep their energy up, supply each child with a water bottle and a bag of gorp.