Why does a Plastic Toy Boat Sink?

A plastic toy boat sinks primarily due to its density relative to water. If the overall weight of the boat, including any water it has taken on, exceeds the buoyant force acting on it, the boat will submerge. Additionally, if the boat's design allows water to enter, it can lose buoyancy and sink. Properly designed toy boats should displace enough water to stay afloat, but any flaws or excess weight can lead to sinking.