during a recent trip to my fave store, the doLLaR trEE, we found a little plastic backpack full of monkeyhead erasers. we picked them up because i thought that they would make excellent math manipulatives.
Bear wanted to play with them the other day. i wanted to see what he was going to do with them, so i just gave them to him. then i sat down and watched. he started counting them one by one and then putting them in a line.
$1 well spent. wouldn't you agree?