This is one of the toys or I will called it learning tool of my boy when he was 3/4/5.
He managed to learn 1-10 fast via this kind of toys. Not only numbers, but colours and shapes too.
In fact, he learned adding up 1+2+3+4+5+6+7+8+9+10=？with all the rings with the tool when he was 4.
This a good Montessori learning too especially for those slower learners.
1+2+3+4+5+6+7+8+9+10 =? (Write your answer in the comment column)