How it works
Each number key has two faces, and holding shift shows the top one.
The exclamation mark is for a shout, a cheer or a surprise: shift and the one key, with the right shift. The question mark makes a sentence ask: shift and the slash key, with the left shift.
The at sign sits in the middle of an email address: shift and the two key. The hash sign and a word make a label, like #cats: shift and the three key.
An address is only for people you know, so ask a grown-up before you type a real one.