There is no definitive answer to this question, as it largely depends on the Dollar Tree location you are asking about. However, some Dollar Tree locations may sell sewing kits, while others may not. It is worth checking with your local Dollar Tree to see if they sell sewing kits.
Additionally, if you are looking for specific sewing kits that are sold by Dollar Tree, it may be best to do a quick online search before visiting a Dollar Tree. Overall, it is unclear whether or not Dollar Tree sells sewing kits, but it is possible that they do.