Final answer:
In toddlers, play is characterized by exploration of the environment, developing imagination with possible imaginary playmates, and the beginning of social play with small preferences for toys and company of other children.
Step-by-step explanation:
Regarding play in toddlers, it's true that children are curious and explore the environment as part of their learning and development process. Imaginary playmates tend to appear as children develop a stronger sense of imagination around the age of three, where they can engage in pretend play and even have imaginary companions. At this stage, toddlers are beginning to establish independence and can show preferences for toys or activities, but still have attachment to parents and may experience separation anxiety. They also start to enjoy the company of other children, although they may engage in parallel play (playing alongside but not directly with other children) before they fully engage in cooperative play with peers as they move closer to preschool age.