Leo stumbles into some weird science when he surprises mad inventor turned mutant fly Baxter Stockman in the Baxter Mutation Lab playset by Mega Bloks Teenage Mutant Ninja Turtles! Baxter is set on making a mutant army and plans to use his big vat of mutagen ooze to do it. But it won't happen on Leo's watch! Build the lab and unleash Leo's Turtle Power to toss crates and take out the Foot Soldier guard. Then, take aim at Baxter and send him falling into the vat below! The set even comes with extra parts to turn Baxter back into a human.