When I prepared this activity I prepared it for two so I could work along side him. I've simply used wool with a piece of pasta tied at one end and an embroidery needle threaded and taped at the other. The most important part of this for Otis is that the needle is longer than the pasta. This makes it easy for him to thread. 

This is simple to prepare, we had everything already. It's also easy to demonstrate.  

Although we haven't yet, you know these make great necklaces.

Otis didn't fill up his wool, he stopped and put the bowl on his shelf. I think it's almost time for post about what is on our shelves at 25 months.