The following is from the Wikki Stix Website describing the composition and uses of Wikki Stix. They come in very handy for builiding raised lines on the fly and should be included in every TVIs bag of tricks.
What are Wikki Stix made of?
Wikki Stix are made of hand-knitting yarn enhanced with a microcrystalline food-grade, non-toxic wax, the kind used in bubble gum and lipstick. They do not contain latex, gluten, nor peanut or other nut oils or byproducts, which makes them an ideal creative activity toy for children with allergies.
Simply stated…they stick! No glue, no paste, no mess. Just press them down with light fingertip pressure and they will adhere to almost any smooth surface. They are also easy to peel up and reposition so “mistakes” virtually disappear, which helps build self-confidence.
There is no preparation, no clean-up, no mess. Press ‘em down, peel ‘em off… it’s that simple!
A few more details
Wikki Stix do not break or tear apart, but cut easily with scissors. Wikki Stix conform to all U.S. Consumer Safety Standards including ASTM D-4236 and F-963, as well as the European Standard BS5665/EN71.