The Tractor Tyres Show
We have a local conference centre near where I stay and once a year they hold my favourite convention. Its the tractor tyres convention, some of the wheels on display really need to be seen to be believed. I have no idea how they manage to move some of them into the display centre as they are ridiculously huge!
It is also quite an educational experience as I (someone who doesnt have any farm or tractor experience) gets to learn pretty much everything on these cool peices of agricutural equipment. There are presentations and educational booklets that you can take home with you also. It really is fun for all the family.
Speaking of fun for all the family, the tractor tyres show also has a father & son race! I entered with my son and we came in second! Well there is always next year, Im sure I will get my hands on the trophy one day!