One solution may be Eggs.....
Egg
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Egg has white outside and yellow yolk inside :-)
There are too many shitty riddles with EGG as the answer.
I wear a green jacket on the outside, white jacket as a second layer, and red jacket inside. I am pregnant with a lot of babies. What am I?
I can be red or green or yellow. I'll help you stay a healthy fellow. Inside, I am white; I do not emit light. But if you look just right, I hold a star. What am I?
