imaginative play,pretend play

particularly beneficial.make sure kids have ample time for it.
Dramatic pretend play with two or more children stimulates social and intellectual growth.
The more complex the imaginative play, the better. Make sure that kids have enough time: a half hour is the minimum. Play that lasts several hours is better. Encourage kids to use symbolic props- sticks for fairy wands and boxes for cars or houses--rather than prefab toys. Older children can be encouraged to participate in drama classes and clubs. But remember: ballet class isn't the same as making up a dance with friends in the backyard.
when playing, let kids lead. if you notice yourself frowning, sighing, or rolling your eyes when your children aren't playing the way you want them to, take a step back and let them run the show.

If you don't enjoy participating in kids' pretend play, skip doing that part to avoid sending the messages that they shouldn't like it either. It's perfectly fine for parents to back off a little and let children play on their own or with other children, especially once they are four to five years old.