Mandalas are pictures with central symetry, it is used as spiritual symbol, but it could be used for coloring too. Great idea for kids, but I believe, that adults would like coloring mandalas at the same time. You can start with white paper or to find somewhere on internet websites with printable coloring pages.
I love embroidery from region Haná in my home Czech republic. Haná was rich region and you can see it on tradiotional costumes, they are decorated with a loth of embroidery. See some pictures here: http://www.hanacke.cz/eng/hanacka-vesevka-fotogalerie.html
Iwant to invite you to gallery of my niece Karolina, ahere are pictures from local exhibition of patchwork. Karolina is only 9 years old, but she can knit, crochet and sew on sewing machine. And she can take pictures. Enjoy. Karolina´s gallery