The Number Race software is designed for remediation of dyscalculia in children aged 4-8. The Cognitive Neuroimaging Research Unit which produced the software say that it may be useful for the prevention of dyscalculia, or to teach number sense in kindergarten children without specific learning disabilities. The software was developed in France by Anna Wilson and Stanislas Dehaene.
Go to the following page to download free in English or French,German,Dutch and Spanish.
If you understand limited English it is still possible to use this.