For Tying/Bondage:
*choke collars
*wide ribbon
*padlocks
*eletrical tape (only use it inside-out!)
*Ace bandages
*jump rope
*wrist weights
*scarves

For Insertion:
*non-porous toys (cleaned and sterilized!)
*flower vase (neck first!)
*Mardi Gra beads
*toy swords
*pirate hooks
*plastic artificial fruit

For Sensation Play:
*makeup brushes
*wooden (not plastic!) clips and clothesline pins
*candles with low wax melting points
*wisks
*different-textured gloves
*silly string
*soft balls (or cut a hole and insert it over end of vibrator)
*baby oil
*spray bottles
*water guns

For Age Play:
*leather belt
*bib
*bottles
*pacifiers
*children's toys

Miscellaneous:
*antibacterial hand wash
*staple remover
*electric toothbrush (sneaky vibe)
*washable paint kit
*tarps
*shower curtains

 http://bdsm-sexperts.blogspot.be/2008/12/cheap-ideas-for-bdsm-play.html