Make a Waterwheel

Design 1
You will need:

Hold the two plates together, and use the point of the scissors to make a hole in the center of both.

Staple as many cups as possible around the edges of one plate, with openings all facing the same way. Staple the second plate onto the other side of the cups so that the cups are sandwiched between the two plates. 

Push the pencil or dowel through the holes.

Hold the water wheel under a running tap. 

Let the pencil or dowel turn in your hands.  What happens to the wheel?

Tie one end of the string tightly onto the dowel or pencil, and the other end to something you'd like to lift, like a pen or a small plastic toy. 

Turn on the water again. Will the wheel lift the object?  How much weight will it lift?

Design 2
You will need:

Cut plastic drink bottle into 3 sections: make the bottom and middle sections 8cm deep. From the middle section cut 4 strips that are 8 cm long and 2cm wide, and then cut each strip in half to make 4cm blades.

On one cork, draw 8 evenly spaced lines down the length of the cork. Cut slits along these lines with a blunt knife (please get adult supervision or help for this). Push a plastic blade into each slit making sure each blade curves in the same direction around the cork.

From the base section of the bottle, cut out a dip in the side to allow water to flow out. Pierce 2 holes on opposite sides of this section at the rim just below the top.

Cut a wooden skewer in half. Feed each half through a hole in the rim of the bottle base and push each skewer firmly into each end of the cork. Make sure the skewer halves can turn freely in the holes.

Put a second cork on the end of one of the skewers. Tie a length of thread around the cork and attach the weight to the other end.

Put your water wheel under a running tap. Watch to see if the energy of the falling water can lift the weight.

You can search the internet to find other patterns for yourself.
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