Bukit Panjang playgrounds guide: Senja Woods cocoon pods 5m up, the Senja Go Trail, shaded Villa Verde under a flyover and sandy Zhenghua Park, free, ages 2+.
Bukit Batok playgrounds guide: Fuji Hill's hillside tube slide, West Plains rope huts, Goodview Gardens towers, two truck playgrounds and a quarry park, free.
Bishan-Ang Mo Kio Park has three free playgrounds: a river-fed water playground open Thursday to Sunday, a ship adventure playground and an inclusive one.
Bidadari Park's free Adventure Playwoods near Woodleigh MRT has a 5m bird's nest treehouse with climbing nets, slides and a zipline, best for ages 7 to 12.