Children just continue to amaze me.
I introduced this activity to my daughter about 3 months ago. She sat on my lap while I silently showed her how to match up the cards. Of course she wanted to try and it was clear that she didn't grasp the concept at all. I tried a few more times to no avail. So I decided to put it away for a while.
Last month I got it out again and without me even showing her again she wanted to do it "all by self". Okay, I thought, good luck! She then proceeded to do the entire activity all by herself PERFECTLY. And not only just one sequence at a time but with all of them laid out in front of her at once.
I am reading Maria Montessori's Absorbent Mind right now and it really just continues to amaze me how children have the ability to absorb everything even without us knowing it.
The link to the printout and instructions to this activity is below. That site is a great resource for other activities as well! Have fun!