The past tense of chuck one's toys out of the cot is chucked one's toys out of the cot.
The third-person singular simple present indicative form of chuck one's toys out of the cot is chucks one's toys out of the cot.
The present participle of chuck one's toys out of the cot is chucking one's toys out of the cot.
The past participle of chuck one's toys out of the cot is chucked one's toys out of the cot.