The new American Lego Masters competition on television reminded me that …

When Matthias Wandel found a mouse in his toolshed he wondered how big a hole the mouse used to get in. Initially he experiments with a wooden maze. Then he used Legos.

Wandel’s five-minute video features a computerized Legos maze equipped with light sensors and a moving gate. Each time the mouse completes a visit, the gate closes a little more, just 1/3 mm. Eventually the mouse discovers he can’t get in. At 10.5 mm (0.413 inches) the gap is just too small.

The mouse takes on the Legos challenge but is limited by the size of his skull.

(video by Matthias Wandel on YouTube)