I travelled too Bali in April 2015 with my family. We stayed at the Courtyard by Marriott in Seminyak which opened in August 2014. It is a great hotel for families as has 3 pools including a kids pool as well as a great kids club. The kids club allows 3 hours free per day for kids over 4 years, and babysitting at a fee for younger kids, and is open from 8am- 8pm. The resort also runs a free buggy to/from the beach. We stayed in a 1 bedroom pool terrace which comfortably fit 2 x adults and 2 x children and allows direct access out to the pool area.
We ate at some great restaurants including Potato Head which has beautiful food, a great view of Seminyak Beach and a grassed area for kids to run around. We loved the tacos at Motel Mexicola and Sea Circus in Seminyak offers a great kids menu.
We also took the kids to Splash Water Park in Canggu which was fairly new and great for kids of all ages – only about 10 mins from Seminyak.