Tinkering experiences in informal learning spaces can engage families in engineering practices and support learning (Pagano et al., 2020). Further, reflections after informal learning experiences can reveal and extend children’s memory and learning (Pagano et al., 2019), but reflections vary by age, culture, setting, program, and other factors (Fivush et al., 2006). We examined how the conversational structure and engineering content of families’ reflections vary across multiple museum visits and across different types of tinkering programs (e.g., open-ended vs. function-focused).