One of the classic Montessori materials is the knobbed cylinders [sometimes called cylinder blocks].  They can be quite expensive to buy, but I found this mini set for a reasonable price and snatched them up. L has mastered each knobbed cylinder set individually [for instructions on how to present them, look here], so I knew … Continue reading Montessori Activities for Toddlers and Preschoolers — Knobbed Cylinders Extension