“I wanna ‘woot beer!'” was one of Mom and Dad’s favorite lines from moi’. They thought it was so cute that I could not properly pronounce the “R” sound. That is, until I had to have Speech Therapy in grade school. You can imagine my embarrassment when the other students laughed at me while I was reading.
When my son was little, he also had a similar problem. The “TH” sound was his nemesis, but I was prepared. When he called our neighbor, “Marfa,” I sat him down and told him my story about speech therapy and told him that if he didn’t want the kids laughing at him he needed to trust me and listen. We started his speech lessons.
I showed him how to hold his tongue to make the different sounds. And we practiced… He got so sick of making “T” and “TH” sounds, but he learned. He never had to have speech therapy, and later in high school I used the same techniques to teach him how to “roll his ‘R’s” for Spanish class.