Toys become fairly segregated by gender around ages 3-4, with some toys like dolls and kitchen sets appealing mainly to girls while toys like action figures and vehicles appeal to boys. Toys are often packaged in colors like pink or blue and featuring mainly male or female characters to target specific genders. 'Boy' toys tend to encourage skills like physical play, construction, and problem-solving while 'girl' toys focus more on nurturing, domestic roles, and fine motor skills.