1. Take the
pasticine (modelling clay) out of
the ping-pong base.
2. Put the marble in the base.
3. Tape the other half of
the ping-pong ball to the top of
the paper tube.
4. Stand the clown on a slight
The clown will flip
from head-to-toe and over again
as the rolling marble makes the
center of gravity move from one
end of the clown to the other end.