Ever since our Olympic tickets arrived the excitement has been ramping up in our house. I’ve had to promise not to buy any more Olympic souvenirs but I couldn’t resist writing about all my purchases in one post. Here are my top Olympic souvenirs for under £20: Biscuits and tin from Marks & Spencer in the shape of the Olympic logo. So far I haven’t done very well keeping my souvenir tins pristine. The Royal Wedding tin I bought last year quickly got adopted as the crayon tin and toddler-fied. Pampers Olympic nappies to keep little bottoms in style The…