Hi, verbal/oral is when you tell a joke, or a funny story.
A practical joke is actually when you play a trick on someone, expecting it to be funny.
So maybe switching the salt and sugar
Sending someone to the shop for a 'long weight' (long wait).
It is action, but it's not a 'sketch' or short play, it is a trick. You may want to look up April fool's day, the day where we all play tricks and practical jokes on each other.