A chimney may be made of a cork, one end being cut on the slant, so that it stands upright on the roof, which is made of cardboard. The whole should be suitably coloured.
An Undershot Wheel. This wheel is very simple to make. It has a number of float-boards arranged round it and is turned by a stream of water moving against the float-boards at its lowest point (Fig. 317).
Fig. 318 shows how the float-boards, which are made of cardboard, are fastened between the wheels. With this undershot wheel, the shoot represented in the plate is not required.
Fig. 319
A Well (Fig. 319). The round part of the well is made from a mantle-box or other round box. A is a fairly deep box turned upside down, with a circle cut out into which the mantle-box fits closely. This gives a fair depth. Cover the well with paper coloured to represent bricks; colour the box, A, green. The cardboard roof is glued to posts, D, and to triangular pieces of wood, B and C, glued to each side of D.
Holes are drilled through the posts to take the roller, E, which is a round rod about ½ an inch in diameter. Drill small holes in it at each end. Push a pin from the end F through the side post into the roller. Bind a piece of wire to form a handle, G, and push one end of this into the roller. Bend a piece of wire or pin to form a hook, tie this to a piece of string, wind it round the roller and fasten the other end of the string to roller with seccotine. If a small chain is used this can be fastened by one of its links to the roller with a staple, and should be so fastened before the roller is put in position.