I'v been trying to work out how to make a script which gets the children from the model then changes their color to a certain color i.e. Bright blue.
This is horrible:
local children = Workspace.Backpack:GetChildren()
for i = 1, #children do
children.BrickColor = BrickColor.new("White")
end

2 comments
^ I'd use in pairs for this instead of a for i = loop... Just saying :#
^ Besides you didn't even check to make sure that all the children are BaseParts. Your script would break if there was a script/tool/ect.