“…Stickers (Benenson, Pascoe, & Radmore, 2007;Blake & Rand, 2010;Gummerum, Hanoch, Keller, Parsons, & Hummel, 2010;Lucas, Wagner, & Chow, 2008), food (Brownell, Svetlova, & Nichols, 2009;Fehr & Fischbacher, 2003;House et al, 2012;Markovits, Benenson, & Kramer, 2003), and money (Gummerum, Keller, Takezawa, & Mata, 2008;Harbaugh, Krause, & Liday, 2003;Leman et al, 2009) have been used to investigate cooperative behavior in children, in a variety of experimental designs. However, to our knowledge only one study have recently compared the effect of different kind of resources on cooperation in 3-year-old children and have found no differences (Warneken, Lohse, Melis, & Tomasello, 2010).…”