Although it is extremely rare foil balloons can cause problems if they become tangled in overhead power lines. Like any discarded item foil balloons become litter if not disposed of properly. When you re finished with an Anagram balloon pop it and place it in a secure trash container. Warning: choking hazard- Children under 8 yearscan choke or suffocate on uninflated or broken balloons. Adult supervision is required. Keep uninflated balloons from children. Discard broken balloons at once.