Gadgets are gimmicks?
No way!!
I am a leftie who grew up in the 60's and 70's when most LH products were not available!
I got my first proper pair of LH scissors and a LH serrated kitchen knife for my 40th birthday! WOW - what a difference! I really wish I'd realised how much easier they were to use than RH ones.
Serrated knives are only ground on one side - if a LH person uses a RH knife, then it is almost impossible to cut straight. I always wondered why I couldn't slice bread. The blades on LH scissors are fastened the wrong way round for a LHer so you have to crane you head over to see what you are cutting. Please get him proper LH scissors (The ones where the blades are fastened the other way, not just those that have an "ambidexterous grip")if he does turn out to be LHed and a LH kitchen/bread knife when it is age-appropriate for him to start using one in cooking.
Lots of things that turn are very counter-intuitive for LHers so he may struggle with door knobs, tin openers, screwing and unscrewing things. I broke the first CD cases I tried to open as I could not work out how they opened and the mechanism was counter-intuitive for me!! Even things like flushes on toilets (old-fashioned handle types) are much easier to use if you are RH as they are on the RHS as you face the loo to flush it!
The other thing I would have appreciated as an older primary and as a secondary school student is a LH ruler - yes really!! The measurements go from right to left on a LH ruler which is the natural way for a LHer to draw a line. When you are asked to draw lines of certain lengths it is so much easier to measure if the units start on the RHS. Still it did my mental arithmetic a lot of good having to continually subtract to work out the lengths!!
Another area where you need to watch for LH friendly products is power tools - (though I know at 5 this won't be an immediate issue for your ds!) Some have switches that are really awkward to use with the LH and even have emergency stop buttons that actually rest in the palm of the LH so are very easy to switch off accidentally!
If you are dubious about all this as a RHer, try using LH scissors and see how awkward they feel for you. This is what a LH child feels like learning to use RH ones.
I think as a LHer I have only come to realise how much more tricky things are to use as I've got older. Growing up - you just automatically "get on with it" as you don't realise any different. It could have been a whole lot easier though. When I was younger
( in my 20's or 30's) I don't think I thought about it much or realised how much it had affected me but I have as I've got older. I was labelled as "cack-handed" asa child but some of it was just about not having the right equipment!!
I actually feel quite strongly about this. We live in such a RH dominated world and yet most people don't ever really think about this. Some teachers couldn't even tell you who was left-handed in their class, let alone make sure they have appropriate equipment to use! I think I'd go so far as to say that Left Handers are probably one of the last unacknowledged, discriminated-against minorities in the UK. We are expected all the time to use stuff that is designed to be used with the other hand and when you make an issue of it, people pull faces or think you are a bit crazy!! I agree that some stuff can't be changed just for Left Handers (door knobs for example?) but I think people should be much more aware.