One of the activities I do with speech students involves filling in the blank or answering a question with a word that uses the target sound they are working on.
For example, working on "L" today;
"You can listen to a radio, but you can watch a ________"
"TV," my student replied.
"Yes," I said, but wanting to get the target sound, I clarified, "What is the longer name for it?"
"Television" he said.
"Great! What is something we dial and talk into?" I asked
"That's right again, but can you think of the longer name?"
Frustrated and aggravated he replied, "Ccccccceeeeeeeelllllllll phone."