Changes in family life related to globalization may include reduction in the collaborativeness observed in many Indigenous American communities. The present study examined longitudinal changes and continuities in collaboration in a Guatemalan Maya community experiencing rapid globalization. Fluid collaboration was widespread 3 decades ago among triads of mothers and 1- to 6-year-olds in 24 Mayan families exploring novel objects during home visits (Dayton et al., 2022). However, in the "same" situation 30 years later, 22 mother-child triads of their relatives spent half as much time in collaboration among all three people. This aligns with globalizing changes and with the pattern of Dayton et al.'s middle-class European American families. Nonetheless, the Mayan families maintained harmonious interactions, in line with preserving important cultural values.