RiddlesOnline version What is? by Estefanía Casas Romano 1 It is on your head and under your hat. Hints 1 It is round and yellow. It is like a ball of fire. 2 Tall and thin, red within. Nail on top and there it stops. 3 It has a face and two hands but no arms or legs. 4 I have legs but I can't walk.