Show one turn

After the goal, do not describe a turn. Play one. Use the real pieces, slowly, and say what you are doing as you do it: "I draw one card. I can play it if it matches the colour or the number. I can't, so I keep it."

People learn a turn faster by watching it than by hearing about it, because they see what moves and what stays still. Choose an ordinary turn, not a clever one. A clever turn shows off; an ordinary turn teaches.

Then let the next person take their turn with you beside them. Their first turn is the second half of the explanation.