Casio Scientific Calculator FX260 Solar Powered Black

Works well.Too small for my daughter

This calculator operates in the old-fashioned way; you can't always just enter an equation as written. With simple equations, (like 5 + 6 = ) that works, but with somewhat more complicated calculations, you may have to plan ahead, use parentheses, like that. I"m OK with that. Like, with this calculator, I can do a calculation, then segue right into the next without having to press the "answer' KEY; the answer is sitting right there already.Also, this calculator is smaller than many comparable scientific calculators. And it's solar, so you don't need batteries. Just ambient light.You got logarithms, trig functions, all kinds of good stuff. It won't fit around my head, either (what was that other poster thinking?).