Red yellow green and blue counters for use with Numicon Baseboard laminates and pattern making. Pack 200Not suitable for children under 36 months due to small parts.FeaturesNumicon is research-based and proven to have a significant and lasting impact on results.Numicon apparatus encourages children to reason mathematically through use of concrete objects.Each Numicon Teaching Resource Handbook activity includes a list of the concrete resources used to support learning.Each Counter measures - 19mm diameter x 2mm depth