No maths outdoors this week!

I'm sorry to say that we did not go out for maths this week.  We had a display change to get ready for and this took up some time.  Towards the end of the week we were looking at 1 more and 1 less and I just couldn't think of an outdoor lesson.  Have you got any ideas?  I will say we were outside for literacy finding wooden rhyming pictures I had hidden in the sand.