The images and voices comes from the Art4Apps project: http://www.art4apps.org/
They are under Creative Common License BY-SA http://creativecommons.org/licenses/by-sa/3.0/
Copyright: Art4Apps.org
License: CC-BY-SA 3.0
Files
background.svg

Copyright: Nitish Chauhan, 2016
License: CC-BY-SA 4.0
Files:
blackpoint.svg
bluepoint.svg
bluepointHighlight.svg
eight1.svg
five1.svg
four1.svg
greenpoint.svg
nine1.svg
one1.svg
seven1.svg
six1.svg
three1.svg
two1.svg
zero1.svg
