toys from trash.
balancing bicycle.
styrofoam ball .
wire man made with straws and sleeves.
cross bar.
thick card frame .
spacer +refill .
spacers+refill.
thick card .
straw+toothpick.
mount man on cycle frame.
refill bush .
pulley wheels.
card discs with deep groove.
attach wheel to frame.
weave long wire to hang weights.
attach magnets or heavy steel nuts.
place wheels no 3-metre long stretched thread.