I bought Martin a set of dominoes for $1 at a thrift store today. I had been thinking that he would really enjoy some and boy, does he. He loves to sort them by color, build with them, knock them over, and put them back in their tin. We had hours of fun with them today!!
I keep them with the special toys that only come out when I can watch him (so we don't lose pieces or break things). I look forward to finding more and more ways to use these for learning. :)