agreed - lego is probably the best easily-available substitute for pyramids; the difficultly is that you have to be a lot more precise up front about which feat

agreed - lego is probably the best easily-available substitute for pyramids; the difficultly is that you have to be a lot more precise up front about which features and combinations are and are not acceptable for use in koans. it does have the easily-relatable trio of colour, size and pip-count, which is nice.