Why are we smarter than other animals? Why can we do things other animals can't do? Find out as you present this lab to your students. Biology, anatomy, zoology, or psychology are all subjects that are supplemented with this lab. Doing a unit on primates? Do it in a fun way. Have students test their fine motor skills by manipulating a variety of common objects. Then, take away their thumbs. Wow! The kids will be amazed by how much everyday actions their thumbs allow them. The lab relates fine and gross motor skills to brain parts and their functions. Critical thinking skills are evident as the kids record data and answer the 13 review questions. Do it individually, in pairs, small groups, or as a demonstration. All will have fun. Answer key is included.