Visiting in August

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Hello im planning to visit and was wondering where i should go. Im planning to visit the interpid aircraft carrier and museum of natural history, statue of liberty and walk around central park. After that i have no idea what to do. I have no intention of going to any skyscrapers (empire state etc.) My hobbies include collecting tcg cards (pokemon,yugioh,) and im really into handheld consoles (psp,3ds) So like is there any place that would sell that kind of stuff? Also any other suggestions are also welcome. FYI i will be there for around a week