This blog post explains preschool engineering during a free-play session by building on children's interests and identifies crucial teaching practices to push children's engineering ideas and thinking forward. Shanina's preschoolers have been reading about different animal habitats. In the process of reflecting chidlren's interest in building shelters, problem-based scenarios are used for better engagement in STEM activites and expand their intersts. The post thoroghly explains the problem-based scenarios procedures and suggestions in such activities.