Ball-Joint Fun! ?with Zoobs-the Zoob® Building System from INFINITOY. Very clever and with lots more odd permutations than most building sets. Zoobs are 2-5/8" long with a socket, a ball, or one of each at each end. The balls are little golf-ball-like things. The small set has a total of (35) pieces in red, green, circus-peanut-orange, blue and silver. The larger set has (125) pieces in the same colors in a sturdy plastic storage case. The car designer package has 76 Zoobs, plus a dozen wheels, axles and tires. Some people here think a clever chemistry teacher could do all sorts of interesting things with these. We wouldn"t know-our chemistry teacher wasn"t clever, he was mean.