This Montessori lesson is ideal for the pre-language shelf in your primary classroom. With 4 similar pictures on each card, your children will be able to spot slight differences in the pictures. Great lesson for fine tuning observation skills in young children.
Cut out the individual cards and laminate. The child can use a small object to cover the picture that is different. I use buttons, but you could use the glass rocks with the flat side, pebbles or the plastic chips used for counting.