Old Testament laughs

So, the other night we were reading the Old Testament reader with the kids. Now, my kids do their best but it takes a lot to retain their attention. So we do things like have them say the peoples' names or places to keep them tuned in. Well, we were reading the story of Esther and when I went to have the kids repeat her name, Jessica got it, but Joshua said, "Es-dirt." We chuckled and said, "No. It's Esther." He said, "Es-turd." We laughed and laughed! Eventually he got it, but I just thought it was too funny...Es-turd!