Rewards/special treats for best work
All parents want their children to behave. If you give kids attention when they are good, it will make them want to be good more often. If you only notice them when they are naughty, it might make them want to be naughty more often.
The best reward for being good is getting your time and attention. Taking time to play and have fun together doesn't have to cost money. A picnic, a walk in the park or a trip to the beach can be lots of fun.