Depending on when in January you're going, I'd recommend a trip to Epcot for the Festival of Arts one day-that opens around Martin Luther King Weekend. Also, you say you haven't been since 2019. Was that in January? If not, don't go with the same mindset I had on my solo trip last January-"Since I'm going to Disney, gotta bring my shorts." Never wore my shorts-paid Disney prices for a pair of sweat pants, and froze! Next time I go in January, I'll bring some cooler weather clothes. Have fun preparing for bringing your grandkids-we're bringing our yet to be born DGD in February.