Birthday Cake Help Please

[Huffpot]

Am planning on making a cake for my DC's birthday on Saturday and have a 13x22.9x5.08cm oblong tin
Can anyone help me with w
quantity/type of cake to use?
This is the cake http://www.google.co.nz/imgres?q=tractor+cake&hl=en&sa=X&biw=1093&bih=489&tbm=isch&prmd=imvns&tbnid=cSL_K3J4o7dexM:&imgrefurl=www.bakingshop.com/cakes/johndeere.htm&docid=ezJSiVRmhln6hM&imgurl=www.bakingshop.com/bc/img/CK-382.jpg&w=300&h=300&ei=VO6nUKTXI6ihigem0YH4CQ&zoom=1&iact=hc&vpx=825&vpy=112&dur=716&hovh=225&hovw=225&tx=142&ty=102&sig=116196379519454762028&page=1&tbnh=141&tbnw=152&start=0&ndsp=10&ved=1t:429,r:9,s:0,i:109 Tractor

Thanks!

http://www.google.co.nz/imgres?q=tractor+cake&hl=en&sa=X&biw=1093&bih=489&tbm=isch&prmd=imvns&tbnid=cSL_K3J4o7dexM:&imgrefurl=www.bakingshop.com/cakes/johndeere.htm&docid=ezJSiVRmhln6hM&imgurl=www.bakingshop.com/bc/img/CK-382.jpg&w=300&h=300&ei=VO6nUKTXI6ihigem0YH4CQ&zoom=1&iact=hc&vpx=825&vpy=112&dur=716&hovh=225&hovw=225&tx=142&ty=102&sig=116196379519454762028&page=1&tbnh=141&tbnw=152&start=0&ndsp=10&ved=1t:429,r:9,s:0,i:109

Sorry for link fail!

<a class="break-all" href="http://www.google.co.nz/imgres?q=tractor+cake&hl=en&sa=X&biw=1093&bih=489&tbm=isch&prmd=imvns&tbnid=cSL_K3J4o7dexM:&imgrefurl=www.bakingshop.com/cakes/johndeere.htm&docid=ezJSiVRmhln6hM&imgurl=www.bakingshop.com/bc/img/CK-382.jpg&w=300&h=300&ei=VO6nUKTXI6ihigem0YH4CQ&zoom=1&iact=hc&vpx=825&vpy=112&dur=716&hovh=225&hovw=225&tx=142&ty=102&sig=116196379519454762028&page=1&tbnh=141&tbnw=152&start=0&ndsp=10&ved=1t:429,r:9,s:0,i:109" rel="nofollow" target="_blank">Tractor

Don't leave a gap between the first [[ and the address!

Do you want chocolate cake or ordinary victoria sponge cake? I have recipes for both if you'd like them.

Pretty much any recipe that's calls for a 7" or 8" will be fine in your tin, although you may have to bake it in two layers as your tin is quite shallow.

Thanks Lady

I was thinking chocolate but am debating just a normal sponge and doing it rainbow colours for a nice effect when its cut.
I was thinking I would need two layers as its not deep