Use rubber bands to make shapes on this 7 x 7 grid with knobbed pegs. Two in a set. Colors may very.
WARNING: CHOKING HAZARD! Small parts. Not for children under 3 years.
Caution: This Product Contains Natural Rubber Latex Which May Cause Allergic Reactions.
I made do with cheaper, smaller boards for a couple years. But in level E, my son needed to make and measure angles on the second side of the geoboard.