MIND MAP
materials
ELECTRONICS
MECHANISMS
speakers
buzzer
batteries
wires
motors
LED
rachet and pawl
bevel gears
worm and worm wheel
cam and followers
gears
springs
pullies
linkages
copper
nylon
aluminum
steel rods
acrylic
TOOLS
thermistors
screwdriver
drill
hammer
nails
heatstrip
bandsaw
lade
spray paint