Shopping for small children can be tricky but a common household item can quickly help you decide if a toy is safe. Children under three are very likely to put toys in their mouths, even those children that are developmentally advanced in other ways. A toilet paper tube is roughly the size of the "choke cylinder" used to determine wether or not a toy poses a choking hazard to children under three. If a toy or any part of a toy can pass through a toiletpaper tube DO NOT give it to a child under three. By law, toys which contain choking hazards must display a warning label stating this fact.