What are animals you can ride on?

A pseudoscorpion (sorry if I spelled it wrong) rides on types of bugs. This is how pseudoscorpions get into places that have doors, things like that.

A pseudoscorpion is a:

any of several small arachnids of the order Chelonethida that resemble a tailless scorpion and that feed chiefly on small insects.

Hope this helps :D