A tray table for a child's car seat having at least two seat belt receiving slots, comprises a table top having an upper surface, a lower surface, and a periphery, and two connecting members extending from the lower surface of the table top for inserting in the seat belt receiving slots to thereby connect the table top to the child's car seat. The connecting members extend from the lower surface at an angle sufficient so that the upper surface of the table top is positioned approximately parallel to a seating surface of the car seat when the connecting members are properly inserted in the seat belt receiving slots. The table top includes an opening serving as a cup holder, or having a container for holding toys, crayons, and other small articles.