||Cut 4 slits in the film container, 1 cm long at equal
distances between them. From a tin can cut 4 blades for the water wheel.
||Push the smaller end into the slits.
||Make a hole with a nail in the exact center of the lid
and the bottom of the film container.
||Push the coat hanger wire through the holes to make an
axle for the wheel.
||Cut off the top of the pop bottle and make two holes
at the opposite ends, about 4 cm from the top. These holes accept the axle
- coat hanger wire.
||Wind a short piece of wire around the end of the axle
just outside the bottle so that it will not move out.
||Make a spool out of the longer end of the axle using
two pieces of cardboard glued on it.
||Tie a string about a metre long to the spool and hang
a "bucket", the cap of the aerosol can.
||Pour a stream of water on the blades of the wheel and
the wheel turns.
||The string winds itself onto the spool and the "bucket"
is lifted up.