abstract angled angles appearance ball colored colorful coloring colors coloured colourful colouring colours common face popular recognisable recognizable round rubber-ball smile smiley-face symbol symbolic toy variations variety well-known yellow architectural architecture bricks brickwork color colour curved curving decorative edge edges edging exterior external going-up outside park paved paving steps texture textured textures upward artwork background children's play coloration malable modelling-clay multi-use oily petroleum-jelly putty-like soft surface surfaces tactile thick thin black blue jigsaw mixed multicolored multicoloured patterned patterns pieces puzzle puzzles puzzling random shape shaped shapes surfacing blended design details interconnected interwoven light lined perspectives pillow-stuffing style vibrant wallpaper barrier boundary closed connected divide divided dividing door garage grill grille joined linked metal ribbed ribbing ribs rollerdoor secure security shadows strength strong