When the Turtles fall into the sewer and get doused with a mysterious ooze, it turns them into growing, glowing Teenage Mutant Ninja Turtles! See the evolution of of Leonardo from 1″ pet turtle to 3.25″ Turtle Tot and finally to 4.5″ Teenage Mutant Ninja Turtle! All the Turtles in this 3-pack come with a special twist—at night they illuminate and glow in the dark, a side effect of the mutagenic ooze!