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birdhouse (health and safety (choking hazards (no small parts), stable,…
birdhouse
health and safety
choking hazards
no small parts
stable
shape
no sharp edges
materials
wood
hardwood
birch
oak
soft wood
mahogony
metals
plastic
colours
warm
red
yellow
brown
cool
blue
purple
sustainability
hard to stain
strength
recyclable materials
easy to clean
tools
sanding machine
file
tenant saw
drill press
appearance
height
width
style
modern
medival
ethnic
user requirements
maximum size
how many birds can it hold
weather resistant
heat
cold
storage
food supply
amount of birds
function
food supply
store enough food
hold at least 2 birds