With the new fivers doing their rounds, the new one pound coin will soon be introduced this month.You can use this to add value in knowledge in your sessions talking about security features:
The design, said to be harder to counterfeit, is the same size as the old, but has 12 sides as opposed to being round.
Around 45 million one pound coins currently in circulation are fake, but the new pound apparently features a secret "patent hight security feature" to prevent this from happening again.
The design itself was created by schoolboy David Pearce who won the nationwide comp' back in 2015.
You'll have until 15th October to either spend your one pound coins or return them to the bank.