I saw that someone had recently searched for “a trailer with child seat for mobility scooter” and at first I was thinking that they might be thinking of something else, but i do think that the person who has searched for this has literally been looking for a trailer that can be attached to a mobility scooter that they could then have a child seated in to tow along with them.
If that is the case then I think this is where you need to stop and think for a moment and to remind yourself of what a mobility scooter is intended for, I think that its a bad idea to try transporting anyone other than yourself on your mobility scooter but also they are not designed to start performing allsorts of jobs.
Some are intended for more heavy duty use, whereas some are more suited to lightweight use like taking them around the supermarket, sure you can carry some light shopping on them and there are plenty of accessories available to help you transport your crutches or walking stick and other manageable items as these are intended to assist you further if needed when not on your mobility scooter of course but trying to make a mobility scooter do a wide range of tasks that it was not built for is generally a bad idea.
Just in the same way that any other mode of transport will experience problems sooner if you use it incorrectly, so too will a mobility scooter if you expect too much from it and try to use it in a way that was not intended by the manufacturer.
You will probably be paying out more often for repairs and spare parts too and there is a greater risk of doing more serious damage to your mobility scooter and yourself if you choose to use it other than what it was built for.
If you need to transport more than a few items and yourself and possibly for a longer distance than normal then it is worth considering whether the mobility scooter is the right choice for those types of journeys and that it might be better to arrange for a vehicle to take you on your journey, this doesn’t mean that you have to be without a mobility scooter for a particular journey but its important that you have the right type of assistance for at least the part of the journey that might become difficult to manage with the use of a mobility scooter only.