To use this Ariel's land and sea castle playset, simply assemble the stackable dollhouse. You can place the furniture and play pieces in the different parts of the castle, either above or below the 'water'. Use the Flounder figure and the Ariel doll with 2 fashions to create fun stories. Remember, the doll can't stand by itself, so you might need to prop it up. As for maintenance, keep it away from sharp objects to avoid damage. If it gets dirty, you can gently wipe it with a soft, dry cloth. Make sure to store it in a safe place when not in use. This playset is for kids aged 3 and up, so adult supervision might be needed, especially when small parts are around.