Using symbols

This morning, my 4-year-old came to me and showed me a piece of paper on which he had written
He read it to me as "equal 5 and equal 5 equal 10"
He had written his 'equals' sign on its side so it looked like 11.
I asked him if he would like me to show him how to write 5 and 5 equals 10, and he said yes so I wrote it out and he looked at it. Then I wrote 1+1= and he said 2, so we wrote 2.
He then took the piece of paper and began writing out his own sums in the same format:
4+5=9 etc....etc.
I was fascinated by his curiosity and diligence to this task, intrinsically motivated. It is so interesting how he pushes himself onwards in his learning, and is so naturally interested in all he learns.

NB: Some of his numbers were written back-to-front, but this is not a concern to me at this time. He is left-handed and sometimes will write in 'mirror writing'.