Foldable playyard

A foldable playyard, comprising:

• a first surrounding frame;
• a second surrounding frame spaced apart from said first surrounding frame in a vertical direction;
• a boundary shelter comprising a bottom wall and a plurality of boundary walls upwardly extended from a circumferential edge of said bottom wall and mounted between said first and second surrounding frames to define a playyard cavity within said boundary walls and said bottom wall;
• and
• a supporting frame, which is surrounded by said boundary shelter, comprising a plurality of supporting arms each coupling said first surrounding frame with said second surrounding frame, each of said boundary walls having a width slightly smaller than a distance between two adjacent supporting arms, wherein each of said supporting arms is capable of moving between a folded position and an unfolded position, wherein in said folded position, said first surrounding frame is adapted to fold towards said second surrounding frame so as to minimize a depth of said playyard cavity, and in said unfolded position, each of said supporting arms is arranged to substantially support between said first and second surrounding frames and to tensely stretch said boundary shelter, so as to form a tension surface on each of said boundary walls.