An infant support structure is disclosed. The infant support structure includes a support base to support the infant support structure on a supporting surface. The infant support structure also includes a seat supported by the support base at a distance above the supporting surface, a lift mechanism configured to selectively impart vertical movement to the seat, and a rotation mechanism configured to, independently of the lift mechanism, rotate the seat about a pivot point. The lift mechanism is configured to allow rotational movement to be imparted to the seat while the seat is undergoing vertical movement.