I also went on a course last week using the boxes theme.(maths). They suggested a box with different lenghts of ribbon in, I placed the ribbon all around the box so that the ribbons looked the same size when I put the lid on. the children then pull a piece of ribbon out and guess if it will be short/long. (I would use a very sturdy box with lid).
The kids loved it keeping them busy for ages
Hybrid Mode
