Saitama Medical University Hospital 1 article published in JoVE Behavior Four Temporary Waterslide Designs Adapted to Different Slope Conditions to Encourage Child Socialization in Playgrounds Zhudi Hua1, Ting Tao1, Risa Akita1, Tomofusa Akita1, Yoshiaki Hayakawa1, Masanori Hariyama2, Hayato Sakurai3, Ricki Colman4, Mamiko Koshiba1,2,3 1Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 2Graduate School of Information Sciences, Tohoku University, 3Pediatrics, Saitama Medical University Hospital, 4Department of Cell and Regenerative Biology, University of Wisconsin-Madison Early life social learning is enhanced by interactions with effectively designed environments. Four events were held at different city parks using inexpensive, temporary waterslides to stimulate social learning. This study describes the prototypes used and the evaluation of the children's interactions.