Once you are matched up you can post and ask for help from a secret bunny helper. That helper can ask questions regarding what the dog likes or dislikes, or anything else you want to know(favorite color,need collar?, need toys?, food allergies,etc.) By using a helper you can remain anonymous until you ship your gift(s).
I buy little things all year long and tend to exceed the $20 limit. Collar, toy, treat, something for the human. It really is the thought that counts, not the size of the box.