The three children can be seen spinning around on the ride and smiling to each other and bumping into other stationary cars.
The Duke and Duchess of Cambridge and the Tindalls joined up to watch Zara, a former silver medal Olympian, compete in the trials on Friday.
As the children entered the event Mia Tindall looks happy to see her cousin George and runs up to him to greet him, as Charlotte bounces alongside them.
The two siblings stayed well clear of each other on the inflatable attraction proving to be experts at ‘dodging’ one another
Prince George appeared to be in his element as he put on a cheerful display while holding on tight to the dodgems ride
Princess Charlotte, three, was seen squealing with delight as she went for a spin on the dodgems under the watchful eye of the Duchess of Cambridge
After the event the Kate and William carried the children away on their shoulders.
Pictures from the event showed that there already seems to be a sense of competition between the two five-year-old cousins Mia and George, with Mia boldly squaring up to George and placing an affectionate hand on his forehead to compare heights.
Mia sported a more stylish look than her male cousin, with a bright purple puffer jacket, silver sequin-embellished jeans and trendy white baseball cap with a pink heart design.
Mia Tindall was hoisted aloft by her mum’s cousin Prince William (centre right), as she made a grab for his ears while Mia’s cousin Princess Charlotte, three, took the high road too, on the shoulders of her mother, the Duchess of Cambridge (left)
Kate appeared to have a bag full of snacks at hand to give to the children during their outing at the horse trials
Cousins Prince George and Mia Tindall, both five, square up to compare their heights, while Mia places an affectionate hand on George’s forehead at the Burnham Market Horse Trials in Norfolk on Friday
Prince George looked like a chip off the old block in a khaki green fleece jumper, dark green jeans and a pair of black and white Nike trainers.
Princess Charlotte, three, was seen squealing with delight as she went for a spin on the dodgems under the watchful eye of mother Kate, 37.
The Duchess of Cambridge was her usual stylish self, dressing informally for the occasion in tight black jeans and a Barbour quilted jacket.
Adventurous Mia Tindall rolls down the hill at the Burnham Horse Trials, Norfolk under the watchful eye of dad Mike Tindall
Last year Zara, 37, fell from her horse but this time she finished a respectable third and fifth in her events as her relatives cheered her on
Zara, who met husband Mike Tindall during the 2003 Rugby World Cup in Australia – won by England – was later spotted being given a congratulatory hug by William, 36.
During the family day out, young Mia was hoisted aloft by her mother’s cousin Prince William to get a better view, and she she made a playful grab for his ears to steady herself on his shoulders.
The two youngsters didn’t shy away from bumping into one another as they got into the swing of the ride
Proud mum Kate smiled as Charlotte zoomed around the colourful attraction, bumping into her fellow riders and shrieking with pleasure