I've seen several two year olds use a mouse and keyboard (well, the arrow keys anyway) just fine. They're not cats. I do think it's a bit easier for them to use

I've seen several two year olds use a mouse and keyboard (well, the arrow keys anyway) just fine. They're not cats. I do think it's a bit easier for them to use a touch screen but it's by no means rocket science to use a mouse and keyboard.