Duplo Math
One of the challenges of taking care of a baby (besides sleep deprivation, constant lower back pains, stress over trying to preserve the life of someone with no innate sense of self-preservation, etc.) is that frankly, babies and their toys offer very little in the way of mental stimulation.
I get a some mental challenge from attempting to read the Japanese childrens books that various people have given us. But now he’s more into Duplos than books. So I experimented a bit and worked out that the dimensions of a standard Duplo block is 2 x 2 x 1.2 units cubed and that the nubs are 0.3 units in height. Here, I show an example of the Pythagorean theorem that x² + y² = z² for a right triangle.