Here are hotels in Melbourne whose on‑site restaurants explicitly offer children's / kids’ menus or child‑focused dining (kids’ high tea, kids’ promotions). I’ve linked the source for each so you can check the current menu and booking details.

• Sofitel Melbourne on Collins — has a dedicated Kid’s / Children’s menu and family offers. (sofitel-melbourne.com.au)
• Novotel Melbourne on Collins — Novotel’s family programme highlights a special kids’ menu in its hotel restaurants. (novotelmelbourne.com.au)
• Crown Melbourne (Crown Towers / Crown complex) — several Crown restaurants (eg. Conservatory, Bistro Guillaume) run children’s menus / kids‑eat‑free promotions and family offerings. (crownhotels.com.au)
• The Langham, Melbourne — Aria / Melba outlets run children’s high teas and child‑friendly menus during school holidays and events. (melbarestaurant.com.au)
• Grand Hyatt Melbourne — offers a “Little Sippers” children’s high tea and other child‑friendly menu options. (highteasociety.com)
• InterContinental Melbourne The Rialto — Alluvial restaurant lists a kids menu (and child pricing for breakfast). (melbourne.intercontinental.com)
• Pullman Melbourne Albert Park — Windows Restaurant shows a Children’s Menu on its dining page. (pullmanalbertpark.com.au)
• Park Hyatt Melbourne — offers a children’s high tea / children’s options (hotel dining pages and booking listings reference kids’ high tea and children’s buffet options). (tablecheck.com)

Notes:

• Hotel restaurant menus, promotions and opening hours change frequently (seasonal menus, school‑holiday promotions, event high teas). I cited each hotel’s current online page above, but I recommend calling the restaurant or checking the hotel’s dining page before booking to confirm the kids’ menu, portion/price/age limits and any dietary‑requirement options.
• If you’d like, I can fetch the current kids’ menu (or PDF) for any specific hotel on this list, compare children’s prices/age limits, or search additional neighbourhoods (Southbank, CBD, St Kilda, Docklands). Which would you prefer?