Составить правильно предложения. Срочно children and their parents\in picnic areas\ a wondreful time\spend\every…

Children and their parents spend together a wonderful time every weekend in picnic areas.People listen to music and dance to music at park concerts every day. Здесь без at никак не получается.Some children play tennis at the sports centre every saturday.Many children and their parents like to take a walk at weekends in the park.Small children often play games in the playground.