https://skolakov.eu/cesky-jazyk/1-trida/budu-dobre-cist-2/hlaska-a-pismeno-J/vyber-slovo/cviceni.html

https://www.youtube.com/watch?v=_aGB31dhFF0

https://www.youtube.com/watch?v=zwMYzeOyaHA

https://www.youtube.com/watch?v=gidvfz5UGJs

https://www.purposegames.com/game/slabiky-k-pismenku-v-game