As the rice cools, prep all your fixings, leaving the avocados for last. Deep fry or air fry your battered shrimp and warm up and shred your crab sticks.
Wash and julienne the carrots, cucumbers, and bell peppers. Thinly slice the red onion, mango, and avocado. Put some cream cheese in a piping bag and leave it at room temperature.
Wrap your sushi mat in plastic wrap for easy rolling and cleanup.
For the Rainbow roll, Dynamite roll and Philadelphia roll you will first place a nori sheet on the sushi mat, shiny side down. On top of that, with wet hands, spread out a layer of sushi rice of about 1/2 inch in height, leaving about 1 inch free on one side. Dipping your hands in a small bowl of water with some rice vinegar as you do this will help the rice not stick to your hands.
For the California roll, do the same thing, spreading the rice over the whole sheet of nori. After the rice is spread out, sprinkle with 1/2 teaspoon of sesame seeds. With a fast and sure movement, flip the nori sheet upside down. Don't worry, the plastic wrap will prevent the rice from sticking to your rolling mat.
For the Rainbow roll, add a few sticks/slices of the veggies and mango, in a straight line across the middle of the rice.
For the Philladelphia roll, add the salmon, cucumber sticks, and avocado slices and pipe cream cheese in a straight line across the middle of the rice.
For the Dynamite roll, add the shrimp (tail side out), cucumber sticks, and avocado slices in a straight line across the middle of the rice.
For the California roll, add the shredded crab sticks, cucumber sticks, and avocado slices in a straight line across the middle of the nori.
Lift the edge of the bamboo mat closest to you with your thumbs while holding the fillings in place with your fingers. Roll the mat away from you, pressing gently to shape the roll. Continue rolling until you reach the border of the nori without rice. Moisten the bare edge of the nori with water to seal the roll.
Cut each roll in 8 pieces, with a very sharp knife. Place, laying them down on a serving platter and, for the Dynamite roll, drizzle each piece with spicy mayo. Optionally, you can add the spicy mayo and a sprinkle of sesame seeds on the other rolls too. Serve with soy sauce, pickled ginger, and wasabi paste.