Flight of the Red Balloon (2008)

As a single mother in Paris, Suzanne (Juliette Binoche) struggles to spend enough time with her young son, Simon (Simon Iteanu), between her job voice-acting at puppet shows and handling a court case against her downstairs tenant (Hippolyte Girardot), who refuses to leave. As a result, Suzanne hires Song (Song Fang), a local university student, to watch Simon while she works and deals with the case. Together, Simon and Song create a vibrant world of imagination, where a red balloon follows them.