this cupboard may seem like a permanent connection but it is indeed a temporary connection. this cupboard can be taken apart with just a screwdriver and then reassembled with just a bit of handy work. so this means its a temporary connection.
These little plastic toys connect together like a jigsaw puzzle. This is a temporary connection as it can be taken apart very easily. because of their shape they slot into each other with a click then they are simply just pulled apart.