The children went to london. the tour hyde park in the morning. the children ducks and squirrels there. then they of trafalgar square. the next stop the british museum. they also the tower of london. the children the famous bell big ben. in the evening they very tired. презент пефект

Тут должен быть Past Simple, а не Present Perfect :)
The children went to London. The Tour started at Hyde Park in themorning. The children fed the ducks and squirrels there. Then they took photos of Trafalgar Square. The next stop was the British Museum. They also visited the Tower of London. The children listened to the famous bell Big Ben. In the evening they were very tired.