The age at which kids can use step stools depends on the child’s abilities and the step stool itself. A 10- to 12-month-old who is standing upright on their own could use a learning tower, for example, since there are extra safety measures in place like safety bars and high sides that they can't slip or fall through. Generally, kids can start using step stools when they are toddlers (1 to 3 years old). Each child is different, though, and you should always supervise step stool use. Check the manufacturer’s recommended age range before allowing your kid to use a step stool.