Natural dye - marigold
When you want to color with natural dye and make yellow color, you can use marigold for example.
After you pick the marigold flowers, you dry them to store for them to be dyed later. Of course, you can use fresh marigold flowers, which will give you bright yellow or orange-yellow. When using the dried version, you will obtain more greenish-yellow color.
Why not find your favorite natural dyed natural material handmade artifacts from different cultures?