Not fancy having your own made Jase? Happy to provide 100 grams of scrap silver (it'll be 925 sterling though rather than 999 grade).
I always find the "bullion by post" places to be quite expensive to be honest, silver doesn't fluctuate a whole lot so paying VAT doesn't really compute for me.
A nice big bar of silver is a lovely thing to have in your hand but gold is by far the better investment... I know you only end up with a sliver of the stuff for the price of a silver bar, but its a market that fluctuates massively (short term peaks and troughs with steady long term growth). Much more fun to track in the markets.
Additionally, if you want to get them into investing young have a nosey at a couple of the Mark Tilbury vids on YouTube, I've had my 12 year old daughter watch some - the difference in investing young and waiting until later life is ENORMOUS! Compound interest, its a bitch.
Additionally, on YouTube, there were some vids recently with a guy who bought some of the sealed blister packs on ebay to test and it didn't end well, I'll try to find them. I'd avoid those though. ;)