since my Raspberry is already connected wireless to the internet is their a way to just get a ethernet splitter plug the splitter into my pi and connect my cubes via ethernet to the ethernet splitter on the pi and afterwards point the cubes to my pi's IP?
Are you talking about a switch or hub??
Am talking about the ethernet port on the raspberry pi. Sort of like using the raspberry pi as a router and plugging the cubes to the ethernet port on the pi.