Five sentences?

1. "After read a horror novel, every night I go to bed I feel like there's a monster in my cupboard and it's going to jump out."

2. "I don't let my children play games on mobile cellphone more than 40 minutes a day."

3. "This stall sells fake duck eggs."

4. "He's an impatient person, he runs when he goes to buy breakfast."

5. "This cosmetic company product."

Are they correct? Are there better ways to say them?