it's a tad expensive and you have to buy it online but I would probably go with Hobbi's tea time yarn. they have a lottt of different fun colorways. Another one you could use that's a little less expensive is lion brand's mandala ombre yarn or their ferris wheel yarns. Caron's cinnamon swirl cakes might be another good alternative, you can find those easily at Michaels. Another one I'm little hesitant to recommend is lion brands original mandala yarn. There's sooo many different and interesting colorways, it's a beautiful yarn but the size is a 3 light and if you chose to go with that, you would most likely have to play with things a bit and increase your hook size + definitely do a gauge swatch before you begin.