'make something microscopic. how small can you work? can you make something that requires a magnifying glass or microscope to see?'
well, this is the smallest thing i thought i could do. i remember always wanting to get my name written on a piece of rice and then put onto a necklace. i always thought how crazy it was that they could write something on a piece of rice. turns out, it's not so hard! i just bought some pens a while ago and they were perfect for this (0.3mm tip). i suppose some people might need a magnifying glass if their sight isn't so grand.