Can anyone tell me what the block-like round toys, in the picture below, might be called? I have no idea. Guthrie had a blast with them a few months ago, and so did Samantha for that matter, and I remember playing with them in elementary school. My mom asked about them today, about a possible Christmas present, but I'm clueless as to what they are actually called, and the internet is not turning up any solid answers. So, to all of you out there, anyone know? Anyone? Help, please. Even if we don't get them for him, I'm going to go nuts until I get their name.