When: bath before bedtime
Where: bathtub (of course)
A simple, but classic bath-time investigation: which container holds more water? We've got three, and it is easy to see that the white cup holds less than the other two. However, comparing the silver and blue isn't so easy. Are they the same size? If not, which is larger?
More math around the houseTriplet of decorative paper airplanes (courtesy of J1)
A mathematical pizza (courtsey of J2 who made the dough and J1 who snapped the picture)
What's mathematical about pizza? Measuring ingredients, tracking the time to mix the dough, talking different shapes for the base (circle and rectangle are never quite achieved, of course), temperature of the oven, time to cook, ways of cutting, probability that any will be left for mommy or daddy to taste....