I asked an employee where the plastic frogs were. On the evening preceding Pesach there is a serious search of the home for chametz. This is the lesson of removing the chametz from our possession. Freedom means having the ability to use your free will to grow and develop.
Slavery is non-thinking action, rote behavior, following the impulse desires of the body.
Our job on Pesach is to come out of slavery into freedom. The sages view the mouth as the most dangerous part of the body. Most of us are slaves to the mouth, both in what we eat and in what we speak. On Seder night we fix this. We have the mitzvah to speak about the Jewish people leaving Egypt to elevate speech, and the matzah and Four Cups of wine to elevate eating and drinking.