Nana Sarfo, 15, is such a fan of Little Pet Shop toys that she started an annual conference for fans that drew about 300 participants to the Henderson Convention Center this year. (Caroline Brehma …

Nana Sarfo, 15, is such a fan of Little Pet Shop toys that she started an annual conference for fans that drew about 300 participants to the Henderson Convention Center this year. (Caroline Brehman/Las Vegas Review-Journal)