J.B.
What a great imagination! I wouldn't worry about it. My kids haven't had an imaginary toy but my oldest did have an imaginary friend and my youngest is apparently reincarnated as he used to tell us elaborate stories about things he did when he was 8 or 10 or a grown up - when he was 3 or 4. "Remember when I was 10 and I woke up on the top bunk and banged my head on the ceiling and fell out of bed? That was awesome!"
Sound like he's found a way to solve any problem he can come up with!