Today Carmen showed that she has some sort of common
sense: During the day it had snowed more, so the plastic
tubes she ran through yesterday had their openings partly
covered by snow.

The tubes were just as interesting to investigate, and
digging snow out of them seemed like great fun. But she
didn't enter any tube, maybe because she saw or sensed
that the other end of the tube wasn't open, or because the
entrance was narrower today due to ice and snow.