With kids, Sushi-Making Class (Tokyo Sushi Academy, Tsukiji) works.
A genuinely fun, low-pressure couple of hours shaping rice, slicing fish and rolling maki, then eating your work — a great rainy-day or arrival-day fallback for couples and families. The fit read that matters: this is a tourist-oriented class, not a culinary masterclass, so pick the operator deliberately. Tokyo Sushi Academy near Tsukiji runs professional, English-led small-group sessions in a real teaching kitchen (the more 'proper technique' option); Sushi Making Tokyo in Asakusa (3 min from Asakusa Station, ~¥13,000) is the warmer, family-friendliest, TripAdvisor #1-rated choice. Depth still hinges on group size, so ask before booking.