Ancient Greek did not have a /ʃ/ phoneme, so the derived Greek letter sigma (Σ) came to represent the voiceless alveolar sibilant /s/.
While the letter shape Σ continues Phoenician šîn, its name sigma is taken from the letter samekh, while the shape and position of samekh but name of šîn is continued in the xi. 
Within Greek, the name of sigma was influenced by its association with the Greek word σίζω (earlier *sigj-) “to hiss”. The original name of the letter “sigma” may have been san, but due to the complicated early history of the Greek epichoric alphabets, “san” came to be identified as a separate letter, Ϻ. Herodotus reports that “San” was the name given by the Dorians to the same letter called “Sigma” by the Ionians.
Disney coloring pages play sets are fun too. Your child can select a favorite character, click on it, and then make pinwheels or paper puppets with stars such as Sleeping Beauty, Mulan, Snow White, Toy Story 2, The Incredibles and Sleeping Beauty. No matter what the theme or the picture, all a child - or the young at heart - needs is the page and something to color with. Pencils, crayons, markers, watercolor paints, chalk. There are coloring books made specially to be used with water-colors, that come with their own little set of paints and brush, and have thicker pages. Family time can be difficult to get in the modern world but this is a great activity that everyone can be involved with. Make sure to display their finished works around the home and show off how proud you are of the kids. A great room to show off their pieces in would definitely be the den or even the stairs. Be sure to get your little ones to sign their work. All practise at writing their names is good! Things to do with kids are so expensive these days that it is great to find how cheap coloring sheets really is. Hopefully we have proved to you that this is a fun activity that your young kids will enjoy. And by using Hello Kitty sheets you will be certainly be a very cool parent. Coloring is a great activity for kids. It offers them a chance to express their creativity while mastering fine motor skills, hand eye coordination, and a host of other things. So, purchasing coloring books can be one of the best things you can do for your child. The following is a look at some of the things to consider when buying kids' coloring books: