An infant-supporting chair. The chair may include a seat and a tray assembly that includes a releasable mechanical latching system for retainingly engaging the tray assembly to the seat when the tray assembly is in a latching position. The chair may further include a tray guidance system that is configured to guide the tray assembly into the latching position. The tray guidance system may comprise at least one magnet feature in the seat and at least one other magnet feature in the tray assembly. Once latched, the tray may be slidably positioned relative to the seat while remaining latched thereto. The seat may be movably supported on a frame assembly and a seat positioning system may be included to selectively retain the seat at desired heights on the frame assembly.