There are a lot of restaurants in Singapore with play area for children: The most affordable one will be McDonald. There are some McDonald provide play areas http://www.kidsandparenting.com/kidsandp/places-to-go/mcdonalds-with-playgrounds-in-singapore I went to the restaurants below with my kids and family and highly recommended: - Ports of Lost Wonder at Sentosa (Hours of water fun) - Café Melba at Goodman Arts Centre (there is a bouncy castle, football field and small sand pit) - Food for Thoughts at Botanic Garden (slides and playground) - West coast park (McDonald and huge park) You can find more suggestions from this blog: http://www.kidsandparenting.com/kidsandp/places-to-go/kids-and-friendly-restaurants-with-play-facilities
Fika Swedish Cafe & Bistro is family friendly and it has a play area for children. Ju Shin Jung serves value for money Korean food and also has an indoor playground. It has an outlet at East Coast and another at Guillemard. Marche has a playground for children as well.
thanks