Firstly let me deal with your five year old. If there was no injury, there is no claim because there is no claim for “could have been injured or could have been killed”.
Under the Consumer Rights Act a claim for goods which are not of satisfactory quality, not as described, or not fit for purpose lies against the Seller and does so potentially for up to 6 years depending on the age of the goods, and the nature of the goods. The 6 years is the time limit under the Limitation Act.
For example, you would expect the motor vehicle to remain of satisfactory quality for six years but not a 10p ballpoint pen.
The Consumer Protection Act on the other hand put liability onto the manufacturer and here is an article on the subject:
So the short answer to your question is that you do have a claim against the manufacturer but if you want the maximum chance of getting anything out of it, I would suggest that you hunted around for some solicitors to see you can get undertake it no win no fee.
If you Google
Consumer Protection Act Solicitors Claim
You will find an awful lot of solicitors with articles on this and looking for this business.
Thank you for letting me assist you with your legal question. I am glad that I was able to help.
I am not certain whether that answers the question for you or not, but I am happy to answer any specific points arising from this.
It will be my pleasure to help you again either further with this or any future questions you have