Join bamboo canes together to provide frames for netting etc, by using old tennis balls with slits cut to take the canes, instead of buying the expensive rubber balls and other fixings. (If you haven't got a tennis player in the family, you can get packs of cheap balls from pound shops).
Take a tip from fishermen and repair torn netting instead of buying more.
Shake the worst of the dirt from fleece and put in the washing machine to use again.
Use clothes pegs for holding fleece, netting, etc. to canes.
Put EMPTY snail shells on the top of canes as eye protectors.
Salvage(or scrounge from furniture shops) large pieces of polythene from large delivered items (e.g. beds) to use as covers for 'tunnels' (made from salvaged wire coathangers).