Nicko

In the left bag is a snake robot, a shell fossil, a recon bird, and a children’s book. In the right bag is a blue diamond, a weightless bag, a cat, and a hat. I, Nicko, will allow you to pick any of these, the bags, for free. Do not worry about how heavy these, the bags, are as they are weightless until you open them, the bags. Then they, the bags, become useless.