intro and lots of questions!

[mikistyle]

Name: miki
Age: 17
How long have you've liked deco-den?: a while...but i've never thought of making my own till recently :)
How did you find out about deco-den?: a flickr group for decoden...and i fell in love = u =
List some of the things you've decorated: none yet!

i reaaaallly like the way these rings look
http://mintymix.com/category_2/Rings.htm
how can i make the cream double colours like that?
what kind of mold is used so the base looks perfect everytime?
and what icing tip is used to create that kind of swirl?

i went to michaels and saw that delight clay costs $6 for a tiny package :(
i'm kind of on a budget so please tell me if there is a cheaper alternative
and any other tips/tools a beginner should know/have!

thanks so much~~~