Strange gadgets

A weighted hula hoop that counts swings, which Arun said terrifies him.

A rope that counts skips so you can't cheat, used for a 30-second skipping challenge.

Used as a reaction-speed challenge that left both of them exhausted, with no formal verdict.

Wrist-strength gadget scored by how fast you can spin it, used in a head-to-head challenge.

A dangerous toy whose tank could explode and whose rockets knocked people out, and the one he tried failed.

A near-identical copy of an Apple Lightning cable that adds payloads, geofencing and self-destruct, which he finds impressive and scary.

A tiny USB stick that poses as a keyboard and lets him run commands remotely, which he finds fun but dangerous in the wrong hands.

The most powerful of the three, adding keylogging to everything else, and he is as impressed as he is scared.

Self-lacing shoes that feel like the future and fasten about two and a half times faster than tying laces.

Alarm clock that leaps off the table and runs away, effective but annoying.

Looks and feels terrifying, and he was far slower than his friend Josh, though he thinks he may simply be the problem.

Heated butter dispenser that spread butter in about two seconds, 30 times faster than a knife, if a little messily.

Magnet-based gadget that fakes about 8,700 steps an hour, useful for games, though he does not see why you would fake exercise.

A huge, heavy RC car he calls one of the coolest things he has unboxed, about 11.5 times faster than a normal one.

Cleans the whole mouth in 10 seconds, twelve times faster, but the clean was not the best.

Drill-mounted scrubbing brush that cleaned patio tiles about ten times faster than a normal brush.

A real, buyable wrist flamethrower that made him feel like a superhero, though he missed his first shot and it is risky; 6 out of 10.

Hugely satisfying peeler that removed the skin perfectly.

Colourful flames that looked straight out of Harry Potter.

A self-powered LED shower head he loved, putting it in his hall of fame.

Looks very cool but he noted it could be distracting in a car.

Stripped the kernels off the cob cleanly and felt satisfying to use.

Very sharp and fun to wear, but the blade is not deep enough to cut vegetables.

It does hold paper together without staples, though it works by wedging the paper.