How many times in your career do you get to publish a heading like "Fewer cookies from an evil puppet" ?
In a paper in Cognition, Tasimi & Wynn found that even 1 year olds prefer a cookie from a good puppet over 2 cookies from an evil one.
But on average, even 1 year olds have a reservation point — offer enough cookies and they'll say yes to the evil puppet.
https://www.sciencedirect.com/science/article/abs/pii/S0010027716300592