Mummy found that it is very hard to teach Ethan maths especially the add and subtract (this two basic add and minus if cannot handle then no need to think about times and division). So yesterday when Ethan was sitting in the potty and in front of this poster, mummy took the opportunity to teach him subtraction. Mummy didn't know whether he understands the concept or not but he seemed to enjoy it.
Mummy was using the shoes as an object(since it was near the shoe rack that time was unprepared just grasped the things nearby). Like 4 -2 =2. Mummy will arrange 4 shoes in front of him and asked him to count them. Mummy than pointed the number 4 in poster and then said mummy took away two shoes (pointed to the poster again) then left how many? Asked him to count again (close the answer using the hand). He will count it and tell mother the number, then mummy will take away the hand and show him the answer in the poster is it same with his answer. If he sees the answer same as what he said, he will show the jubilant cheers.
So when he sits on the potty again, he will ask his mother to take out his shoes and play the game again. Like today he went and open the shoe rack and arrange the shoes by himself and asked mummy to play with him. Great is it? He loves it. So mummy now is thinking of taking other objects to substitute the shoes.