Have a blast making your own time traveler devices. These were inspired by the show Dr. Who on PBS. Children will love creating their own gadgets: all they need is junk parts and imagination!
My clever daughter made these gadgets and she started by raiding my robot making box. This box is a box filled with parts of broken items that I thought could look good as part of a robot. She used a hot glue gun but younger children will likely need you to do the gluing to their specifications.
I hope this will help get your creative juices flowing.
Here you see: A Super Sonic Detector and its on/ off button
a Surveillance Bot147 and an Electronic Spyglass.
Here you see a portable Detector Device 3B and a Medical Scanner 919 (can detect disease)
an Electronic Lighter (extinguishes light or illuminates the immediate vicinity) and a Sonic Toothbrush (picks up particles and analyses them).
Not only do you get to invent gadgets, you also get to work out their capabilities.