A tray assembly includes a base body having a top surface, and a socket member extending downwardly from the top surface and defining a socket hole having a top opening that opens at the top surface.

A resilient member is disposed in the socket hole. A top cover is movably disposed in the socket hole above the resilient member. The top cover is movable upward and downward to switch between a first position and a second position. In the first position, the top cover covers the top opening and is limited from moving downward. In the second position, the top cover is movable downward from the first position, and the resilient member is pressed and stores energy for returning the top cover to the first position.

A tray assembly includes a base body having a top surface, and a socket member extending downwardly from the top surface and defining a socket hole having a top opening that opens at the top surface.

A resilient member is disposed in the socket hole. A top cover is movably disposed in the socket hole above the resilient member. The top cover is movable upward and downward to switch between a first position and a second position. In the first position, the top cover covers the top opening and is limited from moving downward. In the second position, the top cover is movable downward from the first position, and the resilient member is pressed and stores energy for returning the top cover to the first position.

A child activity center includes a tabletop having a top play surface and a bottom surface opposite the top play surface, and a central opening. A plurality of legs, are attached to tabletop and a lower platform is attached to the legs by a plurality of straps that are connected to the platform. A child seat is advantageously removably attached to the tabletop via over the central opening, in one form. Optional unique clips attach toys to the tabletop and one or more optional openings or windows in the tabletop allow an infant to see through the tabletop to the observe objects therebelow.

An access-optimized infant support device comprising a lower support frame and a seat or resting portion supported on the lower support frame, whereby the lower support frame maintains the seat or resting portion at a height allowing a line-of-sight eye-contact interaction between an infant on the seat or resting portion and an adult seated at a standard dining table, and also allows close proximity between the infant on the seat or resting portion and an adult seated on a standard sofa.

A highchair includes a building block table, a booster stool and a feeding chair. The bottom of the booster stool is detachably connected to the top of the building block table. The bottom of the feeding chair is detachably connected to the top of the booster stool. Four sockets are provided on the top surface of the building block table. An elastic cover that is adapted to the socket covers the top of each socket. A plurality of vertical grooves are spaced apart on the inner periphery of each socket. The bottom surface of each socket is provided with a first spring receiving groove. A plurality of protruding blocks are spaced apart on the outer periphery of each cover. The protruding block is matched with a corresponding groove. The bottom surface of each cover is provided with a second spring receiving groove.

A highchair includes a building block table, a booster stool and a feeding chair. The bottom of the booster stool is detachably connected to the top of the building block table. The bottom of the feeding chair is detachably connected to the top of the booster stool. Four sockets are provided on the top surface of the building block table. An elastic cover that is adapted to the socket covers the top of each socket. A plurality of vertical grooves are spaced apart on the inner periphery of each socket. The bottom surface of each socket is provided with a first spring receiving groove. A plurality of protruding blocks are spaced apart on the outer periphery of each cover. The protruding block is matched with a corresponding groove. The bottom surface of each cover is provided with a second spring receiving groove.

A changing table comprises a wall assembly and a tray assembly. The wall assembly comprises wall housing, a transparent-to-UV-light panel, and a UV light source. The wall assembly and tray assembly form a changeable angle α in between them. The tray assembly comprises an exterior first surface and an interior second surface. The second surface is configured to receive an infant and at least a portion of UV light generated by the UV light source.

A multifunctional desk includes a top plate, a leg portion that supports the top plate in air, a rotating shaft provided below and parallel to the top plate, a rotating plate provided below the top plate, a first fixture, a second fixture, and a slide plate provided below the top plate and above the rotating plate. The first fixture fixes the rotating plate to the top plate or releases the rotating plate from being fixed to the top plate in a state of protruding in front of the top plat. The second fixture fixes the rotating plate to the top plate or releases the rotating plate from being fixed to the top plate in a state of being retreated below the top plate. The slide plate protrudes in front of the top plate or is retreated below the top plate by sliding in parallel to the top plate.

A highchair includes a building block table, a booster stool and a feeding chair. The bottom of the booster stool is detachably connected to the top of the building block table. The bottom of the feeding chair is detachably connected to the top of the booster stool. Four sockets are provided on the top surface of the building block table. An elastic cover that is adapted to the socket covers the top of each socket. A plurality of vertical grooves are spaced apart on the inner periphery of each socket. The bottom surface of each socket is provided with a first spring receiving groove. A plurality of protruding blocks are spaced apart on the outer periphery of each cover. The protruding block is matched with a corresponding groove. The bottom surface of each cover is provided with a second spring receiving groove.

A highchair includes a building block table, a booster stool and a feeding chair. The bottom of the booster stool is detachably connected to the top of the building block table. The bottom of the feeding chair is detachably connected to the top of the booster stool. Four sockets are provided on the top surface of the building block table. An elastic cover that is adapted to the socket covers the top of each socket. A plurality of vertical grooves are spaced apart on the inner periphery of each socket. The bottom surface of each socket is provided with a first spring receiving groove. A plurality of protruding blocks are spaced apart on the outer periphery of each cover. The protruding block is matched with a corresponding groove. The bottom surface of each cover is provided with a second spring receiving groove.