Kids full colour motorcross shirt print on back and brand on front

C'est ce qu'une entreprise en/au(x) Australia recherchait pour leur t-shirt design

Hi all, I am looking for an awesome shirt design with plenty of colour. The theme is motocross and it must include a trick or stunt with a lot going on in the picture.
I would like a back picture and my branding on the front. The age bracket is 8-15 and needs to be vibrant and exciting.
I’m looking for a winning design that sells, I hope you can help.
I have attached a picture of my branding. Voir plus