The grounds of your villa will provide ample outdoor areas to play. The pool will also keep them entertained. The beach is only a few steps away and provides a great walk to collect shells and visit Echo Beach or Seseh Village.
To wear off some of that excess energy take a walk through the village and see free roaming chickens, ducks and cows in the surrounding rice paddies. The Balinese people are amazingly friendly and love children. There are always small children playing around the village and language never seems to be any barrier. There are fishing boats and temples within the village beachside area all a short walk away.
Bali also has some great tourist attractions well suited to families.
Some of these are Bali Waterbom Park – an amazing waterslide park for kids of all ages, beautifully landscaped with many restaurants inside the park. You can spend a full day here. There is also Bali Bird Park, many monkey forests, and the Bali Zoo. Also worth exploring, are the many cheap market shopping areas for locally made toys and clothing.