Prepare sushi rice according to package instructions
Lay a nori sheet on a flat surface
Spread a layer of sushi rice on a corner the nori (4 squares, one with rice, one with cucumber, one with tuna, one with rice or avocado and tear the nori sheet to fold it
Top with tuna, avocado, cucumber, and carrots
Carefully roll up the nori sheet to create a wrap
Slice the wrap into pieces and serve
