Jan Triska starred in both this film and the sequel (Obecna skola / The elementary School). This was the last film to be released before his death in 2017.
Dominika Frydrychová's debut.
The opening scene, where Edo imagines being at war, is similar to a scene in the sequel (Obecna skola / The Elementary School) where Edo and his friend play in an armoured vehicle, imagining that they are soldiers.