How did I not know about these things??? The girls were talking about them at lunch one day, saying how they're great for having the kids make the letter formations with them and then they have something tactile they can trace with their finger. And of course it's fun to do it.I looked them up today. They are awesome! And they're totally going to Colombia with us.
Evidently they are wax covered pieces of string. They stick to nearly everything, and come off without a problem. So one can make all sorts of 3 D things with them.