If little kids could play more, you´d have better engineers, better managers and more inspiration in the workplace.If you deny a toddler the chance to play and then put him in a preschool where he is always competing and being measured, you get fear and that leads to an unwillingness to take risks. You end up with boring adults.

As quoted on page 56 in "Under Pressure" by Carl Honoré (2008) and also quoted in the Vancouver Sun newspaper on April 28th 2008 and in a 2013 academic paper entitled Hard Skills Will Qualify You, with Soft Skills You’ll Rank the First by Eva Trumpesova Rudolfova, Lenka Zouhar Ludvikova of Masaryk University, Czech Republic. Also quoted in many other sources including in Spanish.