Sims 3 Generations - Can't play with imaginary friend doll.?

I recently got the Sims 3 Generations. One of the things I was most excited about was the imaginary friend for children sims. My couple had triplet girls & I was disappointed to see that not one of them received the doll. I don't usually like to have too many children at once but I went ahead & tried for another baby to see if they might get a doll. They had twin boys & both received the doll in the mail from a family friend. I can see that each of the boys has the doll in their inventory. And both dolls are actually different from each other. The boys are now toddlers but aren't able to play with the dolls. It won't let me drag it out of my inventory & there are no options when I click on it. Nothing happens at all. Am I doing something wrong? Has anyone else experienced this? I tried searching online & didn't find anyone else saying they had this issue.