1)Try to Find a simple task for your machine to do
2)Sketch your machine before you do anything else to save some materials
3)Gather your materials some of them are;
dominoes
fans
PVC pipe
magnets
duct tape
marbles
cups or bowls
miniature toy cars
paper towel tubes
string
chess pieces
chop sticks
ping pong balls
popsicle sticks
hairdryer
books
spoons
hotweels clrs and tracks
slanted table and marbles
toilet paper rolls
smart phone
zipline using clothing hanger
and if you want to use a couple of recyclable materials like
cardboard toilet paper rolls as tunnels and you can use
books as height etc.
4)assemble your machine try to get at least 10 steps and try to challenge yourself to add on