The Laughter Effect - Johnny Ball

<p>Johnny Ball is an English television personality, children&#39;s television presenter, writer and populariser of mathematics. He regularly appeared on British television for several decades, predominantly on the BBC, featuring in or presenting programmes such as <em>Play School, Think of a Number, Think Again, Think It ... Do It, Think...This Way </em>and<em> Johnny Ball Reveals All. </em>He has also published a number of non-fiction books.</p>