Read the book, A Bad Case of Tattle Tongue and discuss the difference between tattling and reporting. Color the statements that are tattling, purple and the statements that are reporting, red. Finish your tattle tongue by coloring it yellow.
New spin on the Tattle Monster. Each student has a bag of 4 cotton balls, if they want to tell the tattle monster something, they have to feed him. If at the end of the day they have all 4 cotton balls, they can buy a piece of candy with them.
Big Green Tattling monster - children take a piece off if they decide their tattle is worth telling you. For every piece of the monster that's left by the end of the week, you put marbles in your jar (or whatever your class management scheme is).