Print out page 1 & 2 and cut them so each description is on a seperate piece of paper. Stick these around your class room and then give the students a detective sheet. Make sure you give them page 4, as page 3 is for you with the answers! Students go round and find out the answers. My kids love it because they get to get out of their seats and it went down very well for an observation too! More able can do the extension activity. Once they have finished, you can get more able to read out the passge and go through the answers as a class.