When autocomplete results are available use up and down arrows to review and enter to select. Touch device users, explore by touch or with swipe gestures.
It can help to guide students in discovering some basic rules through practice. Many uncountable nouns are liquids (such as water) or very small units (such as rice). This sorting activity gives your children practice in reviewing which food nouns are countable, and which are uncountable. There's also an advanced extension with really tricky nouns such as 'furniture' and 'advice' that intermediate level students often struggle with.