Answer the question about text:

He smiled brightly at the twins , receiving a loud ' yes ' in unison . " Well well , what did you do in my absence ? " He shook the one leg Kyojin was holding onto , making him squeal . " We were playing Hide and Seek with daddy Hae . "

What 's a possible reason they were playing hide and seek ?
Because they think it 's a fun game to play .