The magnets can come off the tic tac toe game pieces, posing a choking hazard. In addition, when two or more magnets are swallowed, they can link together inside the intestines and clamp onto body tissues, causing intestinal obstructions, perforations, sepsis and death. Internal injury from magnets can pose serious lifelong health effects.
The connectors that are attached to the solar panels can develop microscopic cracks that allow moisture to leak into them while the system is producing electricity, posing an electrical shock hazard.
The lithium-ion battery packs in the self-balancing scooters/hoverboards can overheat, posing a risk of smoking, catching fire and/or exploding.
The casing on the power adapter sold with sound machines can break when plugged into an electrical outlet, exposing its metal prongs, posing an electrical shock hazard.