This adorable fair isle nested heart hat knitting pattern has cute rows of multicolored nested hearts on a cute pink background, perfect for your baby or toddler! This cute Valentine’s Day Baby Hat knitting pattern is knit in the round and requires basic knowledge of fair isle or stranded knitting. If you choose to make the rows of hearts two different colors as shown in the sample, there will be two rounds of knitting that use three colors at once (but it’s very manageable).