Electric Walking Dinosaur Toys for Kids - Small Tyrannosaurus with Detachable Tail Simulated Flame and Realistic Sounds, Best Dino Gifts for Boys & Girls 3-5 5-7 Electric Walking T-rex is up for auction in Toys & Games. The current bid is $7.00, 75% below the $27.59 MSRP, in Good Condition. This auction has ended — similar items appear in live auctions regularly.