I've run a couple undergraduate research projects (sponsored by NSF funding and internal grant funding). If you are an undergraduate interested in doing one of these, here are some resources to give you a sense of the projects that I've done with students in the past and to give you some ideas of the types of topics my research involves.
In Spring 2022, I mentored an interdisciplinary undergraduate research project on topological data analysis, where the students learned about homology, Betti numbers and persistent homology, and I got to learn about ant colony interaction networks. See the students' poster here.
One of my research projects involves looking at cut and paste invariants of manifolds via algebraic K-theory. While the full machinery behind this uses more complicated category-theoretic tools, there are questions about the structure (such as equivariance under a group action) in lower dimensions that could be appropriate for an undergraduate research project.
In Spring 2024, I mentored an undergraduate independent study on categories, 2-groups and higher symmetries. See these students' poster here.