Children’s ‘Little Spider’ Glow-in-the-Dark Eyes Halloween t-shirt. ‘ Kids soft-styled t-shirt with Glow-in-the-Dark eyes vinyl print. Impossible to photograph so you will have to take our word for it when we say it is a really nice bright glow in the dark image. 100% cotton. Sizes; XS – Ages 3-4 years, S – Ages 5-6 years, M – Ages 7-8 years, L – Ages 9-11 years, XL – Ages 12-13 years.