S18 Cylinder Insets
Block A: same height, different diameter
Block B: same diameter length decreases
Block C: diameter decreases, length decreases
Block D: diameter increases, length decreases
Remove cylinders & replace by blocks, then do 2, 3 & 4 blocks together and eventually do exercise blindfold.
Visual and tactile education of differing dimensions.
Buy / DIY Material(s)
Constructive Playthings search on “cylinder blocks”