Hat knitted with 6 mm knitting needles not densely viscous. You will need less than 100 grams of acrylic yarn for children. The entire hat, except for the top, is knitted into three strands of different colors connected together. You can use leftover yarn from past projects. 

The hole for the tail are stockinette stitch into one thread.. The main part of the hat is knitted with an elastic band 1 front loop x 1 purl loop.
The cord can be taken ready-made in a suitable color or crocheted