twiddle

Example:He was fiddling with his rings and seemed anxious.

Definition:To move one's fingers or hands in an aimless or restless manner.

Example:She was juggling her phone, car keys, and notebook as they walked.

Definition:To handle or manipulate in a restless manner, as people, objects, or one's own ideas.

Example:As she waited, she started doodling on a piece of scrap paper.

Definition:To draw or write aimlessly or unconsciously, especially for passing time.