The joints in your fingers  are the easiest ones to crack, but many people also crack the joints between vertebrae in their neck and back, and even their hips, wrists,  shoulders and so on.
Les articulations de nos doigts sont les plus faciles à craquer, mais on peut craquer nos articulations entre les vertèbres du cou et du dos, et aussi nos hanches, nos poignets, nos épaules etc.