When my mom was here recently she did this activity with M, and we have been doing it since then a bit too. On one side of a paper I draw three or four items, and the same items on the other side (in a different order). M's job is to draw a line to connect the items that match.
Today we did it with shapes, pictures, and letters.
Then, as an added twist, we did the activity with upper and lower case letters (match the capital to its corresponding lower case)
I like how this activity is flexible enough to be changed according to whatever M happens to be learning at the time.