Brooke Mueller -- Be Careful What You Wish For

Brooke Mueller celebrated her birthday with twins Bob and Max ... and you could see the wheels turn as she made a wish before blowing out the candles.

Brooke was at the L.A. Zoo with the 4-year-olds she had with Charlie Sheen, when everyone stopped for a makeshift birthday celebration. The video was taken in August, just after she lost custody of her kids.