How do you make a costume of horrid Henry?

To create a Horrid Henry costume, start with a simple outfit: a red t-shirt and blue jeans to reflect his signature look. Add a green and yellow striped sweater or vest if you want to mimic his character more closely. Complete the costume with messy, tousled hair or a wig to capture his unruly style, and consider adding accessories like a toy spider or a mischievous grin to embody his naughty personality. Don't forget to practice your best cheeky expressions!