英文關鍵字
attractor
back
behind
boy
brother
child
childhood
children
circling
draw
ellipse
experiment
experimentanium
female
frame
girl
grapher
human
indoor
kid
male
mechanic
mechanism
museum
oval
page
paint
pair
paper
path
pen
pendulum
people
physics
piece
plotter
recorder
register
rotates
round
sister
spins
stand
surface
sway
swing
trajectory
turn
two
write