Happy Hello Yellow Day! 💛​ official_colinthecaterpillar and I are joining youngmindsuk and thousands of schools by doodling what makes us Happy this World Mental Health Day, Thursday 10 October, to support young people’s mental health.​ We've doodled Penny, Connie, and OF COURSE a pack of Percy Pigs. 😉 What will you be doodling? 👇​ #helloyellow #worldmentalhealthday #percypig #colinthecaterpillar