She is ready for new conversational challenges. At about eighteen months, most children speak in short sentences. They are ready to learn how to be equal and active conversational partners. Their first conversations are with an adult. Soon they can converse with another child or a small group.
Most children are eager to participate when conversations are natural, social events.
They are less likely to be interested when conversations are used to teach skills or test knowledge. These opportunities occur during routines such as when children are getting ready for bed or while adults and children do chores together such as wiping the tables before snack. You're going to build a snow lady. That sounds like fun. You can have a turn when he's finished.