Review on LEARNING ADVANTAGE Manipulative Equivalents Subtracting by Michael Robertson

You must first know that the parts are made of cardboard or similar (not plastic or similar material), but that is not a problem if used correctly. My kid worked well with him and he can teach many aspects of factions. I've tried other brands but the pieces were small enough that kids could memorize it in a few games and lose their favor but this one is really good, the pieces can be played with many times and the child won't feel like it get bored quickly or stop thinking every time, so it is recommended