For clothes you can go to H&M, Zara or Bumps to babes. For toys nothing like Toys R Us its the best. for books you can go to Pollux in HK station, Bookazine on Queen's Road and in Jardine house. I discovered this amazing small shop in TST station towards the TST (E) walkway, its called Crown books. The collection is small but amazingly priced.
Happy shopping!!!