As the children navigate the centers to explore and interact with the materials, they develop interests.   Children as we have discussed in the previous documentation, they each have similarities and differences in how they perceive the world around them.    They interests may develop through constant interaction or experiences they have had with the materials.   It is essential to allow children to engage with different hand-on materials as they grow in all of the domains: physical, social, emotional, language, and cognitive.   As we continue to observe and understand the whole child, we learn about their choices and curiosities as they encounter hands-on activities.