A toilet trainer assembly is provided, having components which compactly fit together efficiently for shipping and stowing while also providing an improved experience for a child during use. The toilet trainer features a base member, a toilet seat, and a compartment which resembles a traditional toilet tank. The base member provides a hollow interior configured to be sized and shaped to fit the compartment and the toilet seat within when stowed. A flush mechanism provided on the toilet tank is configured to produce various sounds when activated.