Grow children's understanding of the lives of humans with this Year 5 How Do Children Develop? Investigation Investigation Lesson PowerPoint. The teaching slides look at the development of humans between the ages of 2 and 13, with a focus on milestones in the toddler years, and includes questions to keep pupils engaged. The lesson includes everything you need to complete a scientific investigation with your class. It also has pre and post-assessment questions, further activities to complete, a thinking deeper question and a quick assessment slide. Download now and try it with your class today.