animal Play with animal of another species. Includes wrestle and chase-flee play. At Gombe chimpanzee youngsters play with olive baboons. At Mahale chimpanzees from older infancy to adolescence seem to solicit human observers to play with them by hit and run, somersault, lift and drop, etc. Bonobos of Wamba play with red-colobus monkeys. Cf. care alloparentally for another species and trifle with. play with object Goodall Object play. Solo play, handling object such as fruit or stone. See also play, play socially with object and toy. See video. play with sand Sand apparently stimulates youngsters of M group to lone or social play. They roll over sand or somersault on it. Repeatedly grab, raise and release handfuls of sand in sitting or quadrupedal posture, appearing to enjoy movement