Answer: Win on the basis of a manufacturing defect
Explanation:
Under Products Liability, those who are involved in making or distributing a product which causes injuries such as manufacturers, distributors, suppliers, and retailers can be held liable for said injuries.
The product was stated to be safe for children above the age of 3 to be able to play with and yet injured Bobby who is 5 years of age. This means that the product is defective in design and so if Bobby can prove this then he should win the case.