If sounds of the city and the park, of climbing down stairs and munching toast can be translated visually, Karla Kuskin can do it. Her morning alarm is heard in big black letters, sending little John scurrying into the bathroom where the gurgles and gargles of washing are accomplished in quick order. Then on to breakfast and the blast, clank, grind of the city street. More peaceful is the park where John sings and bounces merrily until dinner. Rhymes and ""noises"" sing out pleasantly for any youngster worth his salt in imagination.