need help in creating a design for miniature farm kit Ended

I want to create a miniature farm kit for kids as a toy .the sides and bottom of the tray which holds soil and plants should be attachable and detachable , tight ,waterproof so that he can extent the tray whenever he wants . all materials are natural , strictly no plastic . along with tray the kit will consist of farm animal toys , huts , soil filled which helps grow plants , small drain to let go off water . small pump for watering , drain lines attachable detachable can be laid as they wish by kids . all farm machinery , tools and tackles minature size that can be used to grow their own small farm. read less