How tall is it?

I had several picture card of landmarks with the size of the landmark on the bottom, a tape measure, a clipboard and pencil and a sheet with the name of each of the landmarks and a place for the child to write his name and their height. I printed a tape measure from the internet and laminated it to make it sturdy, I rolled it and held it together with a paper clip to it would stay on the tray. The children could have a friend measure them or a teacher. They enjoyed seeing how tall they were and how they compared to their friends and to the landmarks.