Start teaching calculator skills early with the appealing Primary Calculator, This bright blue calculator is both solar and battery powered (includes 1 AA battery), Students can start with basic math operations and work their way up to more advanced concepts such as percents and square roots, Perfect for independent math practice, Features Include: 4-function Three key memory Auto shut-off 8-digit display Measures 21?2"" x 41?2"", Ages 3+ SKU: EDRE4792