To make the earthquake table you need
Stiff upholstery foam, one block approx 22 cm x 114 cm x 7 cm
Wood and hardboard (see diagram for approx dimension), pieces of
Broom handle, section, a few cm long
Felt or rubber feet
Paint (e.g. Hammerite grey)
large paper clip
Construct the baseboard and assemble it as shown in the diagrams.
The beading on the baseboard needs to be positioned so that the vibration generator fits securely.