The Queen was enthusiastically welcomed by Ugandans

Hundreds of youngsters greeted the Queen and the Duke of Edinburgh with cheering and clapping when they visited Kitante School in Kampala.

As part of the visit Prince Charles and the Duchess of Cornwall took part in a trip to the source of the River Nile.

The Royals' four-day visit was warmly welcomed by Ugandans who greeted their arrival in their tens of thousands.

The Queen also presided over a Commonwealth heads of government summit being staged in the capital.

Stilt dance

During her visit to Kitante school, the Queen was shown crafts by Ugandan tribes and a display of artwork by pupils - including a pencil portrait of her.

The royal couple then watched a performance by students, including singing, poetry and a stilt-walking dance.

In pictures: Uganda summit

Formally opening the summit on Friday, the Queen said the importance everyone placed on dialogue and "respect for fundamental human rights" put the Commonwealth in a strong position to lead.

Earlier in the trip she toured a specialist Aids centre where she publicly acknowledged the plight of sufferers by shaking the hand of a man with HIV.

Prince Charles, who is visiting the country for the first time, took part in a trip to Jinja on the banks of Lake Victoria, to visit the source of the River Nile.

Taking time out, the prince and Camilla smiled at photographers and engaged in a spot of sightseeing along the river's banks.

Looking at the expanse of water that lay ahead of her, the Duchess of Cornwall said: "We have only got four-and-a-half-thousand miles until we get to the other end. See you on the other side."

The stretch of river was reportedly swept for crocodiles ahead of the couple's arrival. However, other wildlife, including otters and sea eagles, were on display.

It is the Prince's first time at a Commonwealth heads of government meeting overseas, which this year debated issues surrounding world trade and climate change - both subjects close to his heart.

Earlier the royal couple had visited a school 34 miles out of the capital, Kampala, and watched as students put on a mock accident as part of a demonstration on road safety and first aid.

The couple visited the source of the Nile at Jinja, Uganda

They will then return to the capital for their last official engagement, a banquet hosted by Ugandan President Yoweri Museveni.

The visit marks the first time in 33 years that Charles has joined the Queen on a foreign trip in an official capacity.

The summit has been overshadowed by the suspension of Pakistan from the Commonwealth over its imposition of emergency rule.

It has also been marred by violent clashes in Kampala between police and opposition-led demonstrators who denounced the Queen for meeting President Museveni, who, they say, is guilty of human rights abuses.