I'd imagine that the squares use the same recipe as the sushi - just put them in a pan. We really like these for the kids (DH & I like them too!) for parties, etc. The only thing is that the fruit roll-ups can't be scored to pull apart in strips or with the "shapes" in them. They split & are really difficult to deal with if they're scored.
Good luck!
Deb
CRISP RICE CEREAL SUSHI
from the California Grill, Contemporary
8 fruit roll-ups
¼ c butter
10 oz miniature marshmallows
6 c Rice Crispies
16 Gummi worms or
24 Swedish fish
Unroll fruit & place plastic down on cutting board. Melt butter; add marshmallows, stirring until melted. Remove from heat; stir in cereal until blended. Spread ~½ cup cereal mixture quickly over each fruit roll, leaving a 1 border on 1 long side. Put 2 worms or 3 fish lengthwise down center. Begin rolling on side w/o border. Press to seal. Cut into 4 slices. Repeat with remaining ingredients. Serve with chopsticks, if desired. Yield: 32 rolls.