This morning we went outside to do some estimating and measuring.We measured the field, the trimtrail, fences and bins. We decided that it was easier to estimate the size of small things, as our results were more accurate for lengths of less than 50 cm. It was very hard to estimate the length of the field! *** UPDATE*** 6.6.2013- Today we worked out that a trebuchet similar to the one at Warwick Castle could throw an average sized S2 pupil a distance the length of two and a half school fields! WOW!!