Rainbow Yo-Yos (One Dozen) by CarnivalSource.com! With the flick of the wrist this rainbow themed yo-yo will roll down and back up. Yo-yo's are a fun indoor or outdoor activity to keep anyone entertained. Find more great items like this in our Rainbow Party Theme category here at CarnivalSource.com. Rainbow Yo-Yos (One Dozen) by CarnivalSource.com are the perfect toy for any age. Each metal yo-yo measures 2 inches in diameter, perfect for young kids and adults alike. They come in a rainbow of colors and are sure to bring a smile to any face. Plus, they ship from our Missouri warehouse within one business day. Find more great rainbow-themed items in our Rainbow Party Theme category.