A motion toy is disclosed to have a swinging mechanism adapted to simulate the swinging action of the wings of a bird, the swinging mechanism including a driving module, two swinging arm assemblies symmetrically coupled the driving module at two sides, two endpieces respectively coupled to the swinging arm assemblies remote from the driving module, and coupling devices coupling the swinging arm assemblies to the driving module and the endpieces to the swinging arm assemblies for enabling the swinging arm assemblies to swing and the endpieces to follow the swinging arm assemblies to swing upon operation of the driving module.