Zoey standing in bed

We have done fairly well with Zoey's sleep for the past couple of weeks. She has been sleeping naps and nights in her crib. She has gone as long as nine hours thru the night without feeding. It has been great.. All until last night. You see, she figured out how to stand in her crib. Last night she woke up about midnight and decided to climb up and cry. I don't feel like writing the details, but it was a nightmare to get her back to sleep. Naps are even worse because there is light and she knows there is fun to be had. I am absolutely stumped. The only thing I can do is hope she stops. Little bugger!