Joey needs to use his fingers to add and subtract. He can also sort blocks according to both their shape and their color at the same time. Based on this information, you know that Joey is most likely in the preoperational formal operational sensorimotor development.

Joey's ability to use his fingers for addition and subtraction indicates he is actively engaging with numbers and understanding basic mathematical concepts. This skill typically emerges during the preoperational stage of development, where children start to think about symbols and concepts in a more abstract way, although their logic is still very limited. Moreover, his skill in sorting blocks by shape and color demonstrates that he is developing cognitive skills related to classification and categorization. During the preoperational stage, children often engage in symbolic play and learn to group objects based on different attributes, indicating a budding understanding of the world around them.