Ratatouille

Maybe its from watching Ratatouille about a zillion times, but Gabe is loving "cooking" lately. I set him up with a bowl of cornstarch, he adds water, and voila...gooey sludge that is fun for hours. I will get him working on dinner soon, but for now he is practicing. He also "cooks" in the bathtub, making pretend apple juice. He doesn't even want boats in his tub anymore...is this normal?