Movable base for a baby walker

A movable base for a baby walker includes a looped base frame, a number of casters, a corresponding number of compression spring members and a plurality of suction cup units. The base frame has a horizontal ring portion with an outer peripheral edge and a surrounding wall which extends downwardly from the outer peripheral edge. Each of the spring members has a first end connected to the ring portion and a second end connected to a respective one of the casters. The spring members are compressible so as to permit movement of the base frame between a first position, wherein the lowermost edge of the surrounding wall is located above the casters, and a second position, wherein the lowermost edge of the surrounding wall is in contact with the floor. Each of the suction cup units includes a shank portion that has a first end connected to the ring portion and a second end that is provided with a suction cup. The suction cup has a mouth that is disposed above the lowermost edge of the surrounding wall and is capable of gripping the floor when one of the casters ceases to contact the floor.