Design screen layout for children's drawing program

I am looking at building a drawing program for children. I would like a mockup of the drawing screen. Need customised icons for the following in selected and un-selected versions. Buttons that take an action (e.g. save) rather than indicate a state (e.g. pen size) will still need a select state to show the user that they have been pressed. You must not use icons/pictures that you don't own, or don't have permission to use. Rights to all images to be signed over on completion of project and must not be used on any other project. These buttons should be round * 8 colour buttons (black, blue, red, green, yellow, pink, orange, grey) * 3 pen width sizes * An eraser * A rotate left * A rotate right * A blank button (for things I haven't thought of yet) * A star button * A red cross button * A tick button * An undo button * A "blank canvas" button (suggest a white square inside the button) These buttons should be rectangular * Quit button * Save button * OK button * Save button * Blank button (for me to add to if needed) Some rectangles where we can place wording or other information A popup window/dialog where we can display messages/help to the user A round info button "i" to bring up instructions A round help button "?" to bring up help A warning icon for use in dialog boxes An error icon for use in dialog boxes A background that can be scaled to ipad retina display aspect ratio. A square white box to draw on A square border/frame for the drawing box All images should be of ipad retina display resolution. Images to be supplied in photoshop in different layers to allow for changes to layout Font information to be supplied. Open source fonts to be used and supplied.