The phrase "toy with" has a number of synonyms that could be used in its place, depending on the context. Some alternatives to consider might include "play with," "mess with," or "tinker with," all of which carry similar connotations of experimentation or passing time without necessarily committing fully to a given task or pursuit. Other options could include "dabble in," "explore," or "test the waters," all of which suggest a tentative or experimental approach to a given activity. Ultimately, the best synonym for "toy with" will depend on the specific context, tone, and intended meaning of the text or conversation in question.