NEW YORK (AP) — In filing for bankruptcy, Toys R Us joins a list of dozens of store chains that have done so already this year as online leader Amazon increasingly exerts its influence over a huge part of the retailing world.The toy chain, hobbled by $5 billion in debt and more intense competition, filed for protection from its creditors ahead of the key holiday season. Like so many retailers that find it harder to co-exist with Amazon, analysts say Toys R Us needs to improve its online services and offering special experiences in the stores.For Toys R Us, that might be game demonstrations or hosting birthday parties. It says it’ll keep its 1,600 Toys R Us and Babies R Us stores open, and keep serving customers while in bankruptcy.