During cerebellar development, climbing fibers reach the Purkinje cell bodies, making perisomatic contacts. Later they reach the dendrites and the contacts they make with these cells are perisomatic and peridendritic and, at the end of their development, the contacts are reduced to exclusively peridendritic. 3D print by Jeremy Swan based on an original illustration by Santiago Ramon y Cajal. Courtesy of the Cajal Institute, Spanish National Research Council or CSIC©