Any alternative use for old mountain bike tyres and inner tube? I have recently changed the original tyres and inner tube of my 15 year old Specialized Rockhopper. They were starting to deteriorate and I got punctures almost every time I took it on gravel paths. 

Before I take them to the local recycle centre, I just wondered if there were any alternative domestic uses for these old tyres and the inner tube? Can they double as something else for gardening or domestic uses? Can they be fashioned into fiendishly simple kids toys?
Tubes are extremely flammable.
I carry a tiny pouch of cut in stripes rubber when backpacking, if things get ugly and I need to light a fire in damp/wet conditions.
Seriously - they burn like gunpowder.
Edit: Reality Check.
Yesterday morning I wanted to start a fire after a light rain. I picked up dry tree branches (from trees, not the ground). Then put about 5cm of tube cut into thin stripes underneath. Touched them with a lighter and was cooking breakfast right away.