For a major battle sequence in one of the seasons of Star Trek: Deep Space Nine, the visual effects crew bought multiple copies of the Klingon and Romulan vessals from the Playmates TNG line.
For Dark Star, a modified Major Matt Mason action figure was used as a miniature for effects shots of the crew in EVA. The previously mentioned M-16 Toy in The Green Berets was also used, heavily modified of course, for the role of the laser unit. The space helmets used were part of Ideal Toys' "S.T.A.R. Team" toy line produced from 1968 to 1971. The talking bombs were made out of plastic model kits for cars and trucks. The elevator controls was a pop-up toy calculator.
Cloak and Dagger used an Atari 5200 cartridge as an important prop.
Several Super Soakers were used as alien blasters and other misc. tools in Farscape.