My guess is that you an CH hatchling on your hand that may or may not have been started on food, at this time of the year they are commonly found in pet store and because of their very young age they need very specific setup and condition to get started and help the feed with consistency before moving to something bigger.
Even when eating with consistency a 10 gallons tank will likely be better suited at this stage.
For now the priority is to get this animal to eat and what I recommended will in the majority of cases help start most hatchling / picky feeder. (Every part counts from the size of the enclosure to the specific bedding)
Aspen is usually used with young hatchlings that will not take their first meal and makes wonder (My theory is the ability to bury in it and feel more secure)
Good luck
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