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+